FreeFileSync Forum

Disabling Fail-safe file copy didn't solve the issue and I still got an error message:

Cannot copy file
"\\192.168.10.199\Workroom\Backup\Outlook\TomerDor.pst" to
"C:\TomerDor\Outlook\TomerDor.pst".
ERROR_UNEXP_NET_ERR: An unexpected network error occurred. [CopyFileEx]

This is not the issue.
This is indeed an Outlook file, but it is not opened during the sync process (Outlook cannot even run on this device which is only a network disk and not a Windows machine).

When trying to sync a large file (over 20GB) from a Local Area Network disk to my PC, I get the following error message after around 80% of the file were copied, and the sync fails:

Cannot copy file
"\\192.168.10.199\Workroom\Backup\Outlook\TomerDor.pst" to
"C:\TomerDor\Outlook\TomerDor~5231.ffs ...