When I copy files to my flashdrive on my home pc they show up in the flashdrive folder and I can open them from the flashdrive at home too. When I get to the office computer and plug in my flashdrive, the flashdrive folder shows that it has no files on it. I tried buying a new flashdrive and the exact same thing happened. Is it my computer or the work computer?? The flashdrives used to work at both locations.