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Brief introduction
SD card is a memory card base on flash.
The different between SD card and MMC is initialization process.
The communication protocol of SD card includes SD bus and SPI.
SD card implements FLASH operation control, including protocol, safety algorithm, data access, ECC algorithm, defect handing and analysis, power management and clock management, through card intelligent control module.
Communication voltage range：2.0-3.6V; operating voltage range: 2.0-3.6V
Maximum read-write speed：10Mbyte/s
Maximum stack of ten cards（20MHz,Vcc=2.7-3.6V)

The multifunction ball pen can be used for signing, storing files and charging both of Android and IPhone. Meanwhile, it is a stylus that is fast and convenient when writing on phone screen.

To get right Vehicle Music U Disk by checking USB port, comments and after-sales service.

One personalized USB Disk can be easily designed by controller, flash and PCB Board.

This video is to guide you how to make one personalized USB Drive by wood. With some creative designs, one Unique USB Disk can be produced on your own. Maybe you could do mass production for bulk USB Flash Drive after watching it.

With 16GB Flash Memory, the customized USB Drive can be done easily.

Micro SD Card is the most minimum size of Flash Storage since 50 years development.

Get trouble of buying fake Micro SD Cards? Will you know what's the difference between real and fake Memory cards? Let's check this video to identify fake and real Micro SD Cards.

Will you need customized printing USB Flash Drives? Let’s take a look how fast we can do the colorful printing, it is the magic process for turning bulk USB Drive to the ones with logo.

Micro SD is still a good option for external storage, but it is not good for phone manufacturers to make money.