One thing I'd like to add: when disconnecting a jump drive, actually any USB mass storage media that you can write on (num cameras included), take care to first use the "disconnect hardware safely" function triggered by an icon on the taskbar (little square with arrow from right to left)!

It's primary function is to flush the buffers and make disconnection. just tearing the plug can destroy the directory structure or only part of your file is on the media........ Happened to me, so I took the lesson.

HTH