which type of storage technology is used in pen drives
USB flash drive A USB flash drive, also variously known as a thumb drive, pen drive, jump drive, disk key, disk on key, flash-drive, memory stick or USB memory,[a] is a data storage device that includes flash memory with an integrated USB interface. It is typically removable, rewritable and much smaller than an optical disc. Most weigh less than an ounce (approx. 30g).[1] Since first appearing on the market in late 2000, as with virtually all other computer memory devices, storage capacities have risen while prices have dropped. As of March 2016[update], flash drives with anywhere from 8 to 256Â GB are frequently sold; less frequent are 512 GB and 1 TB units.[2][3] Storage capacities as large as 2 TB are planned, with steady improvements in size and price per capacity expected.[4] Some allow up to 100,000 write/erase cycles, depending on the exact type of memory chip used, and are thought to last between 10 and 100 years under normal circumstances. shelf storage time.[5][6][7]
File system Linux supports numerous file systems, but common choices for the system disk on a block device include the ext* family (ext2, ext3 and ext4), XFS, JFS, ReiserFS and btrfs. For raw flash without a flash translation layer (FTL) or Memory Technology Device (MTD), there are UBIFS, JFFS2 and YAFFS, among others. SquashFS is a common compressed read-only file system.