AutoRecover save location
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\excel\options Options
autorecoverpath text Description
This policy setting allows you to specify the location where AutoRecover information is to be saved. Directing the location to a network drive may allow you to back up these files along with other network files. If you enable this policy setting, you may specify the location where AutoRecover information is to be saved. If you disable or you do not configure this policy setting, the default location is %userprofile%\Application Data\Microsoft\Excel.