Flash-drives

A USB flash drive is a data storage device that includes flash memory with a integrated Universal Serial Bus (USB) interface. USB flash drives are typically removable and rewritable, and physically much smaller than a floppy disk. Most weigh less than 30 g this is why they are preferred over floppy disks, in 2005 floppy disk drives where abandoned for USB slots.

Some allow up to 100,000 write/erase cycles, depending on the exact type of memory chip used, with a 10 year shelf storage time. USB flash drives are often used for the same purposes for which floppy disks or CD-ROMs were used, i.e. for storage, back-up and transfer of computer files. They are faster, smaller, have a lot more capacity, theyare also more durable and reliable because they have no moving parts.

USB Memory is nonversatile memory. This means that it will continue to store data when it has no power supply, this makes it more usefull than versatile memory such as RAM.