accessing files

I have a cruzer edge 8gb.

i can enter my vault and move between the sub files. the files have sizes attributed to them. when i try to open the file it will not open. i can move the file to my pc but it reads empty file when i try to open. I can add files to my vault and access them.

I am a bit stupid about the tecnical details so anyone kind enough to reply please keep it simple.

regards ( braindead )

If you copy the file all the way to your PC and open this, what error is showing up?