Micro SD Memory Guide

MicroSD is a format of removable flash memory mainly used in small electronic devices such as cellular telephones, GPS devices, portable media players, MP3 players, video game consoles and expandable USB flash memory drives. The card measures 15mm x 11mm x 0.7mm and is currently the smallest memory card available. For comparison, it is roughly the size of a fingernail, and a quarter of the size of an SD card. Adapters are available to allow the MicroSD cards to be used in devices with a full sized SD slot, a MiniSD, and a Memory Stick Duo. However, not all devices will be fully compatible.

MicroSD cards are are available in capacities from 64 MB to 8 GB as of March 2008. SanDisk is currently developing a 16 GB version. Cards 4 GB and larger are available in the SDHC format. A 12 GB SDHC card was announced in January 2008. TransFlash and MicroSD cards can be used interchangeably in devices made for the other. MicroSD was originally derived from SanDisk TransFlash.

Many popular brands of cellular phones use MicroSD cards. These include the BlackBerry Pearl and Curve, Many Motorola phones including the RAZR and the KRZR, dozens of models of Nokia phones, Several models of Samsung mobiles, the Sidekick 3 and the Sidekick LX. Adding extra memory to cellular phones has become popular in recent years due to the addition of digital cameras, video recorders, and portable music players to the devices. Memory cards made for cellular phones are smaller in size, and with a lower voltage than ones for many other devices.