Introduction

SD cards are fundamental to our everyday tech. They offer a compact and efficient way to store and share data. Whether using a smartphone, camera, or gaming console, these cards boost functionality. With ongoing tech advancements, understanding SD cards’ types and features is essential. This write-up will explore everything about them to help you choose the best cards for your devices.

History and Functions of SD Cards

The late 1990s marked the evolution of SD cards. First of all, he SD Association introduced them in 1999 to cater to the need for smaller storage solutions. Then the original SD card supported up to 2 GB. In 2006, SDHC expanded that to 32 GB. By 2009, SDXC enabled storage up to 2 TB. Finally, this evolution kept SD cards relevant as technology advanced.

The Function of an SD Card

SD cards work as flash memory tools. Their non-volatile storage allows them to hold data without power. Inside, a controller pairs with NAND flash memory. When data is saved, the controller writes it into memory cells. This setup provides quick access to stored files. Speed classes help define data transfer rates, ensuring compatibility with many devices.

Applications of SD Cards

SD cards play a key role in various devices.

• Digital cameras rely on SD cards for storing photos and videos. Higher-capacity cards enhance burst shooting and allow for high-definition video.
• MicroSD cards help expand storage in many smartphones. They let users save photos, music, apps, and documents, making storage more flexible.
• Tablets often use microSD cards for extra storage. This keeps essential files and media easily accessible without depending on internal memory.
• Some gaming consoles accept SD cards for downloadable content and game storage. This feature helps gamers manage large libraries easily.
• Drones capture high-quality images and videos using SD cards. Other electronics, like smart TVs, also rely on them.

Types of SD Cards

Different types of SD cards cater to specific needs. Knowing these details can help you pick the best card for your device.

1. Standard SD

Standard SD cards were the original format of these cards, with storage between 128 MB and 2 GB. They have a simple file system and work with devices made for this type. While less common now, they are still beneficial for basic tasks, like in older cameras.

2. Secure Digital High Capacity

With multiple storage options, from 2 GB to 32 GB, SDHC cards expand device capacity. Also, they use FAT32 for larger file sizes and better organization. Besides it, modern smartphones and cameras often support SDHC cards. Therefore, they provide a smart way to boost storage capacity.

3. Secure Digital eXtended Capacity

SDXC Cards provide 32 GB to 2 TB storage options. The exFAT file system they use accommodates larger files and improves performance. Great for high-resolution video recording and professional photography, these cards suit advanced applications. Remember that SDXC requires compatible devices. They do not function with Standard SD or SDHC.

4. microSD

MicroSD cards are tiny and lightweight, designed as smaller SD cards. You can find three main types:

• MicroSD: Typically smaller in capacity, usually less than 2 GB.
• MicroSDHC: 2 GB to 32 GB, offering a balance of storage and compatibility with most devices.
• MicroSDXC: 32 GB to 2 TB, perfect for high-performance needs, such as 4K video recording.

Choosing the Right SD Card Type

When selecting an SD card, consider the following parameters:

1. 1. • When selecting an SD card, start with storage capacity. Namely standard SD cards hold less data than SDHC and SDXC cards, which offer more extensive options.
      • Evaluate costs and availability. Standard SD cards can be the least expensive. In other words, SDHC and SDXC prices vary by capacity and speed. MicroSD cards are commonly available at similar prices.
      • Speed is the key. Look for speed classes, particularly UHS-I and UHS-II. UHS-II cards deliver higher data transfer rates, perfect for fast photography and 4K video.
      • Check your device compatibility with the SD card. For one thing, standard SD cards work with older models. For another thing, SDHC and SDXC are common in newer devices.

Pros and Cons of SD Cards

Advantages

Easy to Carry

SD Memory cards are small and light. You can slip several into your pocket or wallet, making it simple to have extra storage on hand.

Boost Storage Space

This card let you increase your device storage. Many smartphones and cameras support them, so you can store more without buying a new device.

Cost-Effectiveness

This storage media is excellent for expanding storage without high costs. It provides various options at different price points, so you can select what works for you.

Versatility in Various Devices

These cards are compatible with many devices, from cameras to gaming consoles. Their flexibility is a big plus for anyone looking to transfer or store data across various platforms.

Disadvantages

Risk of Data Loss or Corruption

Users may find important files lost because of card failures or accidental deletions. This risk increases when cards aren’t appropriately ejected or if they experience physical damage.

Compatibility Issues with Older Devices

Modern devices support different cards. However, older devices may have limits. Always check before using a new card.

Speed Limitations in Some Types

Not every card performs equally. Some may have low read and write speeds, affecting tasks such as HD video recording or large file transfers. You should know speed classes to pick a suitable card.

Final Thoughts

Choosing an SD card involves careful consideration. First, confirm its compatibility with your device by checking the specifications. Next, assess your storage needs. Larger capacities are ideal for high-resolution photos and videos. Speed is also important. If you regularly transfer large files or record HD videos, opt for UHS-I or UHS-II cards. Reliable brands improve durability. Look for trusted manufacturers known for their quality. Lastly, find reputable retailers to ensure you get the original product.

Introduction

A memory card can affect your camera’s performance. Compact Flash Vs SD card have dominated the market for years, each bringing something different to the table. As camera tech evolves, picking the right card becomes essential.

Your card’s speed and compatibility are crucial for high-res photos or 4K video. Here’s how CF and SD cards compare so you can pick suitable ones for your camera and shooting needs.

Overview of Compact Flash VS SD Card

Compact Flash Cards

Compact Flash cards are a solid choice for digital photography. SanDisk designed them in 1994 to deliver speed and durability. Initially, they had limited storage, but now they can reach over 1 TB. This expanded capacity is ideal for professionals who require reliable performance on ample shoots.

SD Cards

SD cards made their mark in 1999 and became crucial for consumer devices. Their compact size and lightweight won many users. The introduction of SDHC and SDXC standards allowed for additional storage and fast transfers. Their compatibility supports everyday photography well.

Functions in Digital Cameras

CF and SD cards are crucial for storing high-quality images and videos. CF cards are often chosen for professional work due to their superior speed and robustness. In contrast, SD cards are user-friendly and cater to a wider audience.

Applications of Compact flash Vs SD card

Compact Flash Cards

CF cards are made for high-performance cameras. They meet the speed and storage demands for quick captures. They’re excellent for dynamic photography, such as sports and wildlife. Their rugged design protects data in difficult environments.

SD Cards

SD cards excel in consumer cameras, action cameras, and smartphones. Their small size fits easily in lightweight devices, making them perfect for casual users. Action cameras, used in extreme conditions, rely on SD cards for their flexibility. They also accommodate various video formats and resolutions.

Specialized Uses

Professionals often choose CF cards for video work due to their impressive write speeds. SD cards, meanwhile, excel in compact camcorders that value ease and portability. This variety allows photographers and videographers to find the appropriate storage for their needs.

Types of Compact Flash Vs SD Card

Compact Flash Card Types

CF Type I

CF Type I cards are 3.3 mm thick and often used in consumer and professional cameras. They support up to 137 GB of storage and typically have transfer speeds reaching 90 MB/s. Most devices designed for Compact Flash will work with this type.

CF Type II

Measuring 5 mm thick, CF Type II cards offer larger storage capacities, often exceeding 137 GB. This makes them ideal for high-resolution images. They have similar transfer speeds as Type I cards and can use technologies like Microdrives, which are small hard drives designed for the CF card format.

ACFast

CFast cards greatly enhance both speed and storage capabilities. Their SATA interface allows for transfer rates over 500 MB/s. With sizes 64 GB to 512 GB or more, they perform well for tasks like 4K video and continuous shooting.

SD Card Types

Secure Digital

The original SD card supports up to 2 GB. While suitable for standard-definition video and images, it has become outdated for most modern uses.

Secure Digital High Capacity

SDHC cards are faster than standard SD cards, sizing from 2 GB to 32 GB. This speed makes them efficient for high-definition video recording and detailed photography.

Secure Digital Extended Capacity

SDXC cards provide storage options from 32 GB to 2 TB. These cards are tailored for professional photo and video work. They often reach speeds of 300 MB/s or more, ideal for 4K and 8K recordings.

Ultra High Speed I

UHS-I cards support SDHC and SDXC formats with transfer rates reaching 104 MB/s. They are perfect for tasks that demand fast writing speeds, like burst shooting.

Ultra High Speed II

UHS-II cards reach speeds up to 312 MB/s. They feature an extra row of pins that enhance data transfer rates. This makes them ideal for professional applications needing rapid writing and reading, such as 4K video capture.

Comparison of CF and SD Cards

When comparing CF and SD cards, a few key points stand out:

Size

CF cards are large and more cumbersome. In contrast, SD cards are compact, making them easier to handle and store.

Speed

CFast cards lead in speed, suitable for high-performance tasks. UHS-II SD cards also provide competitive speeds, while traditional CF cards typically lag behind modern SD technology.

Use Case

Professionals often opt for CF cards in DSLRs and high-end cameras, drawn by their durability and speed. SD cards are more frequently used in consumer devices, action cameras, and mobile phones for their adaptability and ease of handling.

Pros and Cons of CF and SD Cards

Pros

1. 1. • Compact Flash cards are tough. They can handle rough conditions and resist damage from drops, making them great for professionals.
      • These cards often have fast read and write speeds, allowing quick data transfer. This feature is perfect for high-resolution photos and rapid shooting.
      • Many professional cameras use CF cards. High-end DSLRs depend on them for their extended storage and quick performance during critical shoots.

Cons

1. 1. 1. • CF cards are bulkier than SD cards, which might not appeal to photographers wanting lighter gear.
         • Newer cameras prefer SD cards. Many modern devices do not have CF slots, reducing the versatility of CF cards.

Pros and Cons of SD Cards

Pros

1. 1. 1. 1. • SD cards work with many devices, from cameras to tablets. It makes them a solid choice for many users.
            • Their slim profile makes SD cards easy to carry. They fit nicely in pockets or bags.
            • SD cards are more affordable than CF cards. This affordability allows hobbyists and professionals to access various storage options.

Cons

1. 1. 1. 1. 1. • The lightweight construction of SD cards can make them vulnerable. They require careful handling to avoid physical damage.
               • While many SD cards perform well, some budget options may lack the speed for professional tasks.

Capacity, Speed, and File System Comparison

Capacity Ranges

CF cards provide a higher storage range, typically from 128 MB to 512 GB, with premium models reaching up to 1 TB. This capacity is excellent for professional photographers needing extensive storage for high-resolution content. SD cards available in SD, SDHC, and SDXC formats range from 2 GB to 2 TB, with SDXC being preferred for high-capacity requirements. The choice between CF and SD often depends on camera compatibility and the volume of data.

Speed Comparison

CF cards utilize UDMA technology, achieving write speeds of 167 MB/s depending on the mode. In addition, this feature is ideal for fast shooting and high-quality video. In contrast, SD cards operate on UHS standards. UHS-I can reach speeds of 104 MB/s, while UHS-II can go up to 312 MB/s. V-rated SD cards indicate their video performance. Higher ratings ensure better 4K and 8K video capture. Always pick a card that matches your device’s capabilities.

File Systems

CF cards mainly use the FAT32 file system, supporting files up to 4 GB and ensuring compatibility with most devices. Larger-capacity CF cards increasingly adopt exFAT, which allows for bigger files and enhances data transfer efficiency. SD cards utilize FAT32 for sizes up to 32 GB, while SDHC and SDXC primarily rely on exFAT. Understanding these file systems helps users avoid size limits and compatibility challenges.

Final Thoughts

First of all, starting with compatibility. Then ensuring your camera works with CF, SD, or both formats. Then, checking with performance. If you capture high-res images or 4K video, choose high-speed cards that fit your camera.

Capacity is another consideration. Evaluate how much storage you typically need. Furthermore, if you often shoot extensively, larger capacities like SDXC or high-capacity CF cards might be needed.

SD cards usually provide better value, while CF cards offer speed and durability, which can be worth the extra cost for pros. Therefore, a good choice to match your photography style, budget, and equipment.

Introduction

Knowing how SSD Drive Vs SD card compare makes all the difference whether you need extra space for your computer or phone.

SSDs offer speed and durability for computers and gaming. On the contrary, SD cards, being portable, are ideal for cameras and mobile devices. Let’s explore more about them.

Overview of SSD Drive vs SD Card

Solid-State Drives

Developed in the late 1970s, SSDs gained real traction years later. The rise of NAND flash memory allowed for faster data access than traditional hard drives. As technology advanced, costs decreased, making SSDs available to everyone. Today, they are the solid choice for storage across devices, including personal computers and data centers, valued for their speed and reliability.

SSDs serve as high-speed, reliable data storage solutions across various uses. Their lack of moving parts results in quicker read and write speeds, lower latency, and better durability. Commonly found in personal computers, servers, and gaming consoles, SSDs store operating systems, applications, and large files requiring fast access. They also use less power than hard drives, making them ideal for laptops and portable devices.

SD Cards

Panasonic, SanDisk, and Toshiba launched SD Cards in 1999 for compact storage in cameras and smartphones. Initially offering just 32MB, SD cards have significantly increased capacity and speed. Now, they can handle larger files and high-quality media with formats like SDHC and SDXC. They are a trusted option for portable storage, especially for limited space.

Famous for external data storage in devices, they often hold media files such as photos, videos, and music. Their small size and ease of swapping make them ideal for storage expansion. Moreover, they are used in some embedded systems and industrial applications that require compact, removable storage.

Types of SSD Drive Vs SD Card

Types of SSDs

SATA SSDs

Serial Advanced Technology Attachment SSDs connect through the SATA interface, previously used for hard drives. They are faster than traditional drives but limited to about 600 MB/s due to the SATA III standard.

Non-Volatile Memory Express SSDs

NVMe SSDs, a significant advancement, connect directly to the motherboard using PCIe. It allows speeds that often exceed 3GB/s. Their lower latency and higher bandwidth make them the top choice for peak performance.

External SSDs

For additional storage that doesn’t require opening your device, external SSDs are a smart solution. They connect through USB, Thunderbolt, or similar ports. They typically underperform than internal SSDs, but they still offer better speed than standard external hard drives.

Types of SD Cards

SDHC, SDXC, and microSD

SD cards have several types for varying storage requirements.

1. 1. • SDHC cards offer storage from 4 GB to 32 GB.
      • In contrast, SDXC cards support larger sizes, from 32GB to 2TB.
      • microSD cards function as compact counterparts to standard SD cards. They offer diverse storage capabilities with SDHC and SDXC formats.

UHS-I and UHS-II

UHS refers to Ultra High Speed, a measure of SD card speeds.

1. 1. 1. • UHS-I cards can handle speeds up to 104 MB/s.
         • UHS-II cards are quicker, reaching 312 MB/s.
         • With an extra row of pins, UHS-II cards ensure faster data transfer and work with compatible devices.

SSD Drive vs SD Card: Which Is Best For You?

Performance Differences

1. 1. 1. 1. • NVMe SSDs are the fastest, easily surpassing SD cards in speed and access times. SATA SSDs offer good performance but don’t quite match NVMe speeds.
            • In contrast, SDHC and SDXC cards offer moderate speeds, with UHS-II cards performing the best.
            • If you need storage for operating systems or software, go with SSDs. For portable devices, SD cards are the way to go.

Cost Variations

1. 1. 1. 1. • On the cost front, SATA SSDs are typically less expensive than NVMe models, which makes them a solid option for budget shoppers. SD cards, especially SDHC versions, usually cost less than SSDs.
            • However, high-performance SDXC and UHS-II cards can get near the lower end of SATA SSD pricing. You should carefully consider your storage requirements and budgets when choosing.

Use Cases for SSD and SD Card Types in Various Applications

1. 1. 1. 1. • In personal computers and laptops, SATA SSDs replace old hard drives effectively. They lead to faster boot times and quicker app launches. This makes them suitable for everyday tasks and gaming while being budget-friendly.
            • Gamers enjoy reduced load times and easy data access with NVMe SSDs, enhancing their gameplay. Content creators benefit from their fast data transfers and smooth playback. They also improve multitasking and facilitate quick access to large datasets in data science and software development.
            • For those capturing images and videos, external SSDs are excellent for large files. Their rapid data transfer and easy USB or Thunderbolt connections allow backups and device migrations.
            • Digital cameras benefit from SDHC cards, which hold enough high-quality photos and videos. Many camcorders and budget recording devices depend on them for standard-definition video.
            • For photography and videography experts, SDXC cards easily accommodate high-resolution photos and 4K videos. Their larger storage and fast write speeds are perfect for long shooting periods. Nintendo Switch players also use SDXC cards for additional game storage.
            • microSD cards hold apps, photos, and videos for smartphones and tablets, allowing users to cope with internal storage limits. Drones and action cameras also rely on their compact size and HD recording capability.
            • UHS-I cards are suitable for mid-range cameras and standard video recording. UHS-II cards cater to high-performance cameras, offering quick data transfer for fast action and 4K video.

Pros and Cons of SSD Drive VS SD Card

Pros of SSD

1. 1. 1. 1. 1. • SSDs have gained popularity for their impressive speed, especially the NVMe types. They enhance system performance and reduce loading times for apps and games.
               • Their lack of moving parts makes them tough and resistant to shocks. SSDs typically last longer, ensuring reliable performance.

Cons

1. 1. 1. 1. 1. 1. • On the flip side, SSDs can be pricey, especially NVMe models. This higher cost might deter budget-conscious buyers.
                  • Many internal SSDs also have limited upgrade options, so it’s vital to consider future storage needs.

Pros and Cons of SD Cards

Pros of SD cards

1. 1. 1. 1. 1. 1. 1. • SD cards are portable and lightweight, and their lower cost makes them affordable for casual users.
                     • Plus, many devices support SD cards, allowing for easy storage expansion without modifying internal storage.

Cons

1. 1. 1. 1. 1. 1. 1. • However, SD cards generally offer slower speeds than SSDs, affecting data transfer and performance with larger files.
                     • They tend to be less durable, risking damage and wear that can lead to data loss.
                     • Their lower write endurance can also impact long-term reliability with frequent use.

Final Thoughts

Choosing an SSD or an SD card is about what fits your storage needs best.

NVMe SSDs shine with their speed, making them suitable for gaming and content creation where quick access is essential.

In contrast, SD cards, especially SDXC and UHS-II, offer adaptable storage for cameras and smartphones. They are great for holding photos, videos, and applications without needing SSD speeds.

Keep performance, capacity, and cost in mind when you choose. The right storage option will boost your device’s efficiency.

FAQs

What NAND flash types do SSDs use?

1. 1. 1. 1. 1. 1. 1. 1. • SLC: One bit of data per cell. Fast and durable, great for enterprise use.
                        • MLC: Two bits of data per cell. Ideal for consumer SSDs with balanced performance.
                        • TLC: Three bits per cell. Offers a good amount of storage for casual use at a lower price.
                        • QLC: Four bits of data. It maximizes storage but is slower and less durable.

What are speed classes and UHS ratings in SD cards?

SD cards have speed class ratings that show their minimum write speeds. The classes include:

1. 1. 1. 1. 1. 1. 1. 1. Class 2: 2 MB/s.
                     2. Class 4: 4 MB/s.
                     3. Class 6: 6 MB/s.
                     4. Class 10: 10 MB/s.
                     5. U1: 20 MB/s.
                     6. U3: 30 MB/s.

The technology of storage is improving year by year, we can store terabytes of data in a tiny chip. Also, those digital gadgets are using TF card and SD card for keeping data. For instance, the devices like tablets, 3D printers, DSLR cameras, Drones, dash cam and the other types all adopt memory cards as their storage option. TF card vs SD card, how can we make right selection for the equipment? Researching into the difference and similarity between them is helpful for making correct purchase.

What is TF card?

TF card stands for trans-flash card. This is a small, removable, and portable storage media for expanding the capacity of various electronic devices. The first launch of it was in 2004, which was invented by Motorola and SanDisk. The presentence of TF card was to replace SD cards at that time. Meanwhile, it got a new name of Micro SD card due to its compact design. With one Micro SD card, user can upload and download data among various devices.

As small as a fingernail is the most amazing part of TF card, which only occupy limited space in the devices. Therefore, especially smartphones adopt it as storage accessory. No matter storing photos, music, movies, files, or applications this tiny media is a better choice.

What is SD card?

SD Card has an official name Secure digital and is one member of bulk memory card group. It consists of controller and non-volatile flash memory inside, therefore, the main function of it is storing data. As if the electronic devices need additional storage, SD card can be a nice option. What’s more, SD card has a unique technology of data security and protection. There is an extra lock button on the shell, it can protect the data from loss in case any mistake formatting. Also, SD cards use non-volatile memory technology, it means the data will not disappear when the power is off.

Due to the reliable technology and portable design, SD card is used for storing important files, photos, documents, and movies. In addition, there are various sizes and formats for SD cards, which are workable with different devices and applications.

The difference of TF card VS SD card

To make a right selection on TF card and SD card, there are numbers of key parameters to consider. Such as dimension, Format, speed, capacity, application range, and cost, all of these are linking to the decision on purchase.

1.Dimension – This is the most obvious difference between TF and SD cards. TF card is much smaller than SD card, therefore, it is a perfect choice for smaller devices such as smartphones, toys, Bluetooth speakers, and the other equipment. While SD cards will be used in cameras or larger devices, the storage space has enough room for it.

• SD Card: 32mm*24mm*2.1mm
• TF Card (Micro SD Card): 15*11*1mm

2.Capacity – The development of flash memory is at a leading and speedy step, which has scaled into sub-32nm nodes and 3D layering. This technology drives memory card to support high capacity. Therefore, both TF and SD cards are available for a wide range of capacities. However, TF card has a bit advantage.

• SD Card: from 128MB to 1TB
• TF Card (Micro SD): from 64MB to 2TB

3.Cost – since the launch of SD card and TF card, the price of SD card is more. Viewing from the physical structure, SD card has extra components. Furthermore, Micro SD cards are mostly applied in consumer devices, the cost will cater to the public. Let’s taking 16GB as an example.

• SDHC Card 16GB Class 10: It is USD 2.85/pc
• Micro SDHC 16GB Class 10: It is USD 2.55/pc

The similarity of TF card VS SD card

Both of TF card and SD are belonging to non-volatile memory card. They are used for storing and transferring data in portable devices. Thus, they can deliver in same format and speed. Although they are in different size, manufacturer has developed SD card adapter for Micro SD. With one adapter, Micro SD can be turned into SD card in one second. Even the device just has SD slot, Micro SD can be compatible as if it is using with SD adapter.

1.File system – memory card basically uses FAT32 by default, as it is a general system workable with most devices. Besides it, it also has exFAT and NTFS due to the different capacities.

• SD Card: Support FAT, FAT32, EXFAT and NTFS
• TF Card: display same file system as SD card

2.Speed – both use speed class ratings, which indicates the minimum writing speed. Thus, the standard of defining the speed is same

• SD Card and TF Card: use class 2, 4, 6, 10, UHS-1, UHS-3, V60 and V90 to tell the speed rate.

3.Application – the function of them is to store data and run applications, consequently they can apply to same devices on some occasions.

• SD Card: Normally users adopt it for DSLR cameras, gaming consoles, tablets, GPS and drones.
• TF Card: People use it in smartphones, dash cam and raspberry pi, but it also can be used in cameras with SD adapter.

Conclusion

With a deep tour of TF card and SD card, you may have a vivid notion of them. No one can image that such a tiny card can support up to 2TB, it gathers human innovation and creativity. TF card leads a compact design and versatile function, SD card offers high safety and great performance. Reviewing your needs or budget, you can make a good selection immediately. SD card is a larger type and compatible with devices with big space, while TF card is suitable for compact devices. In other words, each has its own advantages.
Hope people can gain meaningful information from this resourceful guide. When you make decision on purchasing TF and SD cards, you will know how to make choice and how to maximize its usage.

The application of portable devices is growing sharply, therefore, the demands on accessible data storage also increase. SD card is not a single group, which has varied ranges available in size, class, interface, and specifications. The word “SD Card” represents a storage media including SD, SDHC and SDXC. Furthermore, it is just one type of bulk memory cards family, the size is the standard one. In order to create a right selection of SD card sizes, let’s start by understanding the use of SD card.

What does SD Card mean?

SD Card is a short term of secure digital card. It is one type of memory card developed by the SD Association. The main function of this media card is to store data such as documents, videos, photos, and the other contents. Also, it presently comes in three types indicating capacity ranges. There is SD, SDHC and SDXC. Standard SD cards go up to 2GB; SDHC represents the range of high capacity from 4GB to 32GB, and SDXC offers extended capacity from 64GB up to 2TB. Manufacturers also use sizes to define SD card capacity, in other words, we have SD card sizes from 128MB to 2TB.

Physical size of SD card

Bulk Memory cards have three major types following their physical size. SD cards are full size one, it is 32*24mm. Mini SD is another member and only half of it; Micro SD is the smallest one and is as small as a fingernail. To know all sizes and types of memory cards in details, let’s sort out as follow.

1.Secure Digital Cards (It includes three types)

• Size for Standard SD/SDHC/SDXC: 32mm*24mm (The physical size of these types is all same)
• Capacity: SD card is up to 2GB, SDHC supports from 4GB to 32GB, SDXC will be available from 64GB to 2TB

2.Micro SD Cards (same as SD offering three types)

• Size for Micro SD cards: 15mm*11mm (This dimension is same for all types)
• Capacity: Micro SD card – Up to 2GB, Micro SDHC – from 4GB to 32GB, Micro SDXC – from 64GB to 2TB

3. Mini SD Card

• Size: 21.5*20mm
• Capacity: Up to 2GB (As it is an old version, the available capacity is small)

Viewing the physical size can have an idea of the storage space. Obviously, SD card will need more rooms for installment. Thus, people use it often in DSLR cameras, tablets, 3D printers and the digital devices with enough spaces.

Labeling of SD Card

To distinguish SD cards in different capacities or specifications, manufacturers have use labels to tell information. As SD card delivers a standard dimension, it has a bigger space than Micro SD to present logo or the other description. Thus, you may find labels stick to the surface.

1.Capacity on the labels

• The density will be the number together with MB or GB, for instance, 8GB, 32GB and 128GB. These are indicating the capacity of SD cards

2.Speed on SD labels

• There are classes to tell speed. For example, you can find Class 4, class 6 and 10 there.  These are important data to tell the writing speed, which is 4MB/s, 6MB/s and 10MB/s by write.
• In addition, there are U1 and U3 also a guide for speed. In fact, U1 is identical to Class 10, but U1 means a minimum writing speed of 10MB/s; U3 requests the write not slower than 30 MB/s.
• Furthermore, the astonishing part is the speed of read. UHS-1 can reach up to 104MB/s by read, and UHS-II cards can hit 300MB/s. The structure of UHS-II card is a bit different, which has two rows of interface pins, this is the reason of high reading speed. Some SD labels will display the specific data of speed to expect good sales, so does SD card sizes.

3.Video speed

• UHS cards has a specific parameter for video shooting. There are V30, V60 and V90, which tells the minimum write speed at 30MB/s, 60MB/s and 90MB/s.

With the info of SD label, users can positively receive basic specification from it. Moreover, it can help people make right purchase.

Order appropriate SD card Capacity

Although users can understand basic info from labels, they are hard to make right purchase. Even there is no limit on budgets, the largest capacity may not fit the device. Prior to order SD cards, it is important to know capacity options in the market. What’s more, it is essential to check with the parameters of your equipment.

1. Old cameras: They only can support up to 32GB in SDHC
2. Latest smart phones: They can use up to 2TB

Therefore, getting the most appropriate SD card is the right way to make purchase.

Besides it, we need to research out the performance of SD card.

1. SD card in high capacity: it normally adopts TLC flash, which delivers fast speed but short lifespan.
2. SD card in low capacity: it uses SLC and MLC flash that helps extend life circle.

At present, the resolution of video and photo is reaching 4K and 8K, it requests one SD card in larger size and higher speed. Thus, 64GB is a basic choice; or you can go for 128GB and 1TB instead as if you have enough budgets.

All in all, selecting SD card sizes is following your actual needs and the requirement of devices. In case you have no idea of the status of equipment, you can collect 8gb, 32GB and 64GB SD cards to test. You will know the right SD card when the device can work after connection with this storage media.

Format size of SD card

Every SD card has file system, this is different from capacity by capacity.

• Format FAT: 4GB or smaller one
• Allocation unit size: 16KB
• FAT 32: from 8GB up to 64GB
• Allocation unit size: 32KB
• EXFAT: supports 64GB or above
• Allocation unit size: 128KB
• NTFS: from 64GB to 2TB

In fact, SD card performance is a bit affected by allocation unit. As you need to select default allocation unit size when formatting, the selection is linking to the density.

Small allocation unit sizes will take more time for data accessing, but large unit sizes can cause more waste. So proper use on unit sizes can bring efficiency on application. For instance, you can go for small size if you just load a few files. However, a large allocation size could be helpful for improving reading and writing if you need store video or films.

Final thought

The performance of SD card is directly affecting by various aspects such as size, speed, file system, video captures and flash type. To purchase a perfect card for photography or any institution, it is wise to know about these factors before any wholesale purchase.

It is important for driving recorders to maintain the best performance. Be sure to use it according to the users guide and choose the most suitable memory card.

With the development of technology, the need for micro SD card on phones has dropped, but its use in other devices has increased. You can choose the most suitable SD card base on your need.

Although uSD is very small, its structure is very compact, with own controller, memory, and NAND Flash and an FTL layer to achieve load balancing. It includes all elements of Von Neuman and is almost identical to TF cards.

SD Card has varies specs, it ranges from SD to SDXC and Class 4 to Class 10