(QNAP) NetBak - The server and the share folder cannot be accessed. Please check the network connection and make sure the server has been turned on.

The connection fails with this error msg:
NetBak 
"The server and the share folder cannot be accessed. Please check the network connection and make sure the server has been turned on."

Solve:

- Check The smb user name/password match on both client/server
- Check share permissions, Everyone user could Read and Change Permissions and smb user has full permission in security tab  in your Server

Thank you.