Hello,
Thank you for posting in Q&A forum.
According to your statement, I would believe it's a configuration or authentication issue instead of accountname/password mismatch.
I would suggest you checking the issue from SMB side:
- Check the SMB related setting between your desktop and laptop..
a. Open PowerShell and run
Get-smbclientconfiguration
on both sides.
b. Open registry editor and navigate to HKEY_LOCAL_MACHINE\CurrentControlSet\Services\LanmanWorkstation\Parameters
on both sides.
Somes times the configuration difference would lead to SMB connection failure.
- Capture network trace
It's also recommended to capture network trace by wireshark or network monitor to capture the network traffic when reproducing the issue (fail to connect to your NAS), and you will get some insights from the trace.
Hope this answer can you help you well.