I have a Nexus 7 running the latest Android (4.2.2) that seems to be stuck as read-only. I cannot transfer any files to or from the device though I am free to look through it. Permissions are: View Content: Only Owner Change Content: Nobody Access Content: Nobody And when I try to change the permission I get this error: Operation not supported by backend I'm baffled. This is a stock install of Ubuntu on my PC and the install isn't that old. Am I missing a lib or something? I feel the need to say it works fine on Windows 7. Thanks for looking.