USB Directories not visible with Mac I recently had some virus on my USB. After cleaning (with PC antivirus), i got all my files back, but the directories on my USB are not shown when connected to my Mac (Lion) computer.
What can I do to access them with my Mac?
Thank you.
I think the MacOS does not show folders if they have the "x" flag missing.  Try going to a Terminal window, then changedir to the folder 

cd /Volumes 
ls 
cd name-of-folder-with-stick


And there try 

ls 
chmod 755 foldername


or even (for all files and folders there)

chmod 755 *