Windows cannot copy file \\?\C:\Users\UserName\AppData\Local\Microsoft\Windows\UPPS\UPPS.bin to location \\?\UNC Path\UserName.V6\AppData\Local\Microsoft\Windows\UPPS ...

I'm about to help a user with a huge user account folder. The appdata folder contains unknown things, including over 200 gig in the hidden INetcache. The user's Documents and Pictures amount to around ...