error code -50 on added second HDD
So I just received my upgrade kit today and installed a second 500 gig 5400 rpm HDD I was using in an external USB case. I formatted the drive yesterday and installed it today. If I try and write to the drive I get "The operation can’t be completed because an unexpected error occurred (error code -50)." Under the disc "Get info" permissions are Read & Write for the admin, Read & Write for staff and Read only for everyone. In Disc Utility I can verify and repair the disc but I cannot erase or partition it. It says that it cannot unmount the disc. Any one else have this problem or have a suggestion? Any help is appreciated in advance.