I have purchased a Sony USM4GN 4GB USB Micro Vault Classic Flash Drive recently. I plugged in into my computer flash drive but it is not recognized by the computer. An Epson Printer plugged into the same drive works fine however.
USB flash drive is often used for the same purpose for which used floppy disks or CD-ROM. are smaller, faster, have thousands of times greater capacity, and is more stable and reliable due to the lack of moving parts.