I'm moving some photos to a folder on a shared NAS drive in our home, which I've marked as "Always available offline" in Windows 7 so that I can add it to the Photos library. Windows wants to store the offline copies of the files on my smaller boot disk, instead of my larger data disk. Is there any way to change this?
To change the location of the offline files cache (by default it's in %windir%\CSC)
If you want to keep the cache contents the process is a bit more complicated:
As a final note, if you somehow manage to mess up the CSC cache (which isn't very difficult, I did that several times...), and Offline files start behaving strangely, you can reset it to a clean, empty state:
Create a new DWORD value FormatDatabase = 1 in the above mentioned registry key and reboot.