What is Micro SD card?

What is Micro SD card?
Like Tweet Pin it Share Share Email

Due to the development of storage industry and cost issue, Micro SD may be gradually retired from the mobile phone market.

Who invent Micro SD Card?

Micro SD card is one tiny external storage product, which aims to extend the storage for many devices such as mobile phones, GPS device, Dashcam, Raspberry Pi and cameras. SanDisk and Motorola jointly invent it. The size of wholesale Micro SD card is similar to the nail of people; its design is following the bulk SD Card.

The initial name of Micro SD Card in bulk is formerly known as Trans-flash Card; also it was officially renamed by SDA Association to Micro SD Card at the end of 2004. Prior to the launch of Micro SD, mobile phone manufacturers used embedded memory to extend the storage. Although the embedded memory was easy to install, the space of these embedded memories were very limited, there was no extra rooms for loading the other data. Therefore, the emerging of Micro SD helps mobile phone suppliers resolve the storage issue. And then the factory emulated the application model of SIM card; and used this way to add slot for the Micro SD Card, it positively resolved the storage issue and brought useful plug-in design. Moreover, the Micro SD Card has various capacities, it can satisfy the demands of consumers and the application of devices.

Mobile phone was the first device to take Micro SD Card as accessory; it was highly popular due to its small size and increasing storage capacity. Along with the development of different demands, there are sorts of new devices launched in the market, these equipment are also adopting Micro SD cards as accessory, such as GPS devices, portable music players, 3D printer, Raspberry pi and so on. Then Micro SD card leads one new demand recently. 

READ  How to Buy Wireless Headphones Online

The details of Micro SD Card

The size of Micro SD card is 15 mm x 11 mm x 1 mm, which is similar to fingernails in size. It is the smallest memory card at present. It can also be connected to SD card slot through SD adapter card. Currently, Micro SD cards are provided with regular capacities of 128MB, 256MB, 512MB, 1GB, 2GB, 4GB, 8GB, 16GB, 32GB, 64GB and 128GB, furthermore the biggest Micro SD launched recently is 1TB, the cost of it is equal to the price of one mobile phone.


SDA published the format of micro SD at CTIA Wireless 2005 on March 14 and subsequently approved the final specification of micro SD on July 13, 2005. At the initial public offering, the storage capacity of micro SD included 32MB, 64MB and 128MB.

This format of memory card is largely supported by mobile phone manufacturers. Motorola is the first company to support the micro SD format, while GARMIN has built GPS maps in micro SD to cooperate with their GPS receiver materials.

In short, what is a Micro SD card? Let’s check the storage accessory of your mobile phone, GPS, Dashcam and the other devices, the Micro SD will be easily found there. However, as the development of smartphones tends to save space and raise more profits, many smartphones are no longer using built-in memory card, maybe Micro SD card will gradually say goodbye to this old friend but it is being workable with many new devices, so it will have new applications in brand-new stage.