OK, I just switched to mac and wanted to transfer a video file from desktop to a WD drive. It said I only have read privileges. I followed the help guide and "get info" etc. The Help guide suggested that there is a "lock" icon I can click on so that I can adjust permissions on this drive but there is no such icon that I can see. It means I cant even access my own drive to transfer a file over....is this a problem because the drive was formatted on a PC? How can I access this drive?? There is no lock icon!! Any ideas?