You'll also need one if you want to install XP on a set of RAID HD's (the only reason I have one). Pretty much any computer with 2000/XP and a USB port will work fine with a thumb drive. I just bought a 256M USB 2.0 one from Lexar Media from Best Buy. It was $50 with a $10 mail in rebate. Has a nice big sturdy keychain loop and the loops on the drive, not the cap (seems dumb the other way, guarantee you'll never lose the cap but not the drive).