I'd like to synchronize my NAS drive to an external drive (Z:), every time trying it I get following error:

Cannot set directory lock for "Z:\".

Cannot write file "Z:\sync.ffs_lock".

Error Code 5: Zugriff verweigert (CreateFile)

One solution I've found here is to Change in properties of FreeFileSync.exe to activate the function "run it as Administrator".

After I do that, FreeFileSync doesn't find my source drive anymore (NAS).

Do you have any solution for this?

Thank you!

David