I use a Memorex 1gb USB drive. I back all my important stuff as well as work, and personal odds and ends. I have carried on my neck, keychain, bottom of a book bag and it keeps on ticking.......i think they are worth every penny they cost........rugged , plenty-o-storage, and reasonable price.........the best way to go for "simple" data backup for your EDC, or B.O.B.