Starting from Windows 10 version 1709 (Fall Creators Update), Windows no longer supports SMB version 1 (SMBv1) by default. This prevents Windows File Explorer from browsing computers on the local network.
You can re-install SMBv1 to make your NAS appear at “Windows File Explorer” > “Network”. However, Microsoft recommends not using SMBv1 due to several known security issues.
To work around this issue, press WINDOWS KEY + R and enter "\\<NAS IP ADDRESS>" to view your NAS in Windows File Explorer. You can get the NAS IP address from the LCD screen of your NAS or by using Qfinder. Alternatively, use Qfinder to locate your NAS and then click “Network Drives” in the Qfinder action bar.
You can also map NAS shared folders as network drives in Windows. Go to “Windows File Explorer” > “This PC” and click “Map Network Drive”. Then enter “\\<NAS IP ADDRESS>\<SHARED FOLDER NAME>” and select a drive letter.