I just got a new laptop - windows 7 pro. If I plug in the Nexus 4, I get all the files regardless if usb debugging is on or not. I can transfer some either way. Try to back up all of it and all I get is "calculating time" nonsense and the computer just sits there and chews. I have no idea if it's doing anything or not. Somehow I don't think it should chew on a folder for 10 minutes and just say "Calculating" I got everything copied on XP, dammit. In fact, the backup folder from XP in March is in the Documents file on 7. The phone is rooted, but I don't have the Nexus tool kit on this laptop. Would it help?