I have created a shared folder on a usb hard drive connected to my computer.  I can create a new folder, but I cannot rename it.  I can drag and drop files into the folder, but it doesnt appear to work correctly.  For example - I drag a sample spreadsheet into a folder on my share.  When I try and open it from the share - excel tells me the file is corrupt.

I am running windows 7 on the "server" computer.