This is a Plugin for Total Commander for Android!
It does not work standalone!
Do NOT install if you do not use Total Commander!
IMPORTANT: If you cannot connect to your server with version 3, then your server probably doesn't support the SMB2 protocol.
Solution: Please open the connection settings by long tap on the connection name. Then disable SMB2. This will use the old SMB1 protocol. Normally the plugin should detect automatically when a server doesn't support SMB2, but some NAS devices seem to react differently.