You never configured the Samba client and a while ago SMB1 got disabled because of some serious security issues.
So create a config file and add to the [global] section client min protocol = NT1 if and only if you cannot upgrade your NAS to SMB2.
OR
Upgrade your NAS ASAP and if it would be advertising its shares to the Internet turn that off right now before you do anything else!!! ¹
After the upgrade, set your NAS to use SMB2 or better: SMB3!
Note 1: Yup, even if you have passwords set because that’s the issue: passwords can be circumvented!
