Did you use any of the fake drive testers?
I have an acer laptop, 500gb hard drive , windows 7.
As i have tons of music/video on my drive and hate to see them vanish if my laptop dies or gets stolen I got some 32gb flash drives to store them on. Things started out ok, files were saved and playable (some video wasn't after copying to flash) but then it just seems to lose stuff after i eject it. I played some music from the flash and after I ejected it and plugged it back it showed the "file empty" thing. when i clicked on "computer" it showed the remote drive and how full it was but the files were gone ( the new ones at least).
Any help is always appreciated!

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