Being highly personal devices we store a lot of data on cell phones. it themundane SMS' or MP3s,videos and photos, storage space is'a much desired element of any cellphone. Some of the higher-end cellphones are coming with a lot of memory onboard; to the tune of eight and even 16 gigabytes. Most of the phones do not come with this kind of memory but have expansion in the form of SD, microSD and miniSD. The most common flash standards, SD is the oldest and largest form factor. MiniSD and microSD have been spawned and recent advances mean you can get a 16GB microSD card; which means 16 GB on the size of your thumbnail.