As I’m sure happens to many these days, you upgrade your main Windows 7 system drive to a new blazing fast SSD, but of course, you run into space issues (unless of course you’re loaded and can afford the proper big ones, or have no media files at all) I recently migrated my inlaw’s main PC from the old 1TB spinning platter SATA disk to a new 120GB SSD. This was great as the system speed has increased dramatically. And since we were upgrading the hardware we also took the opportunity to roll back the system to factory (and then apply the updates and drivers). I however didn’t mention the fact that the old disk was now setup as a data drive, partitioned as “D:”. Shortly thereafter he called to say he was having trouble moving his files back from his external storage. I knew immediately that the drive had run out of space (I think the “My Documents” library system needs some work)
Some quick googling turned up the following guide:
http://lifehacker.com/5467758/move-the-users-directory-in-windows-7