I'm trying to move my iphone data from my old iPhone 5 to an iPhone 6s. To start, I'm trying to back up my iPhone 5 to my Windows 7 computer running iTunes. It connects, starts the backup, but about 15 minutes into it I get a message saying there's not enough space on the computer to do the backup.
I have 582GB free on that drive (It's backing up to the C: drive).
So, needless to say, I'm confused. I've found a few articles that talk about issues with iCloud and wireless backing up, but this is connected direction to my PC so I don't think that's the issue.
The official Apple documentation says to "free up space" which isn't the issue, or contact support. So, no real help there, either.