Question for the group: 4 GB usb jump drives are at a good price point, and I've found 4 GB micro-disks, also usb, at very close to the same price. When off, both are essentially shockproof, and when plugged in will have no real shock. It then really boils down to storage mechanism for reliability comparison. The disk is old familiar technology with no write-limited lifetime. Flash is maintained at a smaller atomic scale and maybe susceptible to airport x-rays perhaps? Maybe bit flipping from some errant particle? If given the choice for important day to day use, or important archival use, which would you use? Thanks, Skip -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist