Hi MetalMatrix_0,
I am an independent advisor and a Microsoft user like you, and I would be happy to help you out with this.
The NAS may be using CIFS / SMB 1.0, which is disabled by default in Windows 10, as it is less secure than newer versions of SMB.
See if this helps:
Go to Start > Control Panel > Programs and then look for the link to "Turn Windows Features On or Off".
It will open Windows Features (screenshot attached) and you may wish to enable SMB1.0/CIFS File Sharing Support if it is not already.
Then, restart your computer and try to connect / map to the NAS drive again.
Image Source:
https://docs.microsoft.com/en-us/windows-server...
I hope this has helped you. If you have already tried this, please reply and let us know and we would be happy to provide some different suggestions!
Regards,
-Ashton