Are the NAS and network storage configured as save destinations compatible with SMB/CIFS protocols?
When saving scanned images directly from the ScanSnap to a network folder, you can only specify network folders compatible with SMB/CIFS protocols.
Specify a network folder that is accessible with a path in the following formats:
Windows
Shared folder with a path in the UNC format
Example: \\Servername\folder
macOS
Network folder with a path starting with "smb://"
For details about system requirements for network folders that can be directly connected to the ScanSnap, refer to ScanSnap Help.