Why my TNAS device could not be detected with TNAS PC desktop program?

It’s mainly the reason that Windows Defender Firewall has blocked the TNAS PC program. Please click “Allow access” when the following window prompts you that Windows Defender Firewall has blocked some features of TNAS PC. Otherwise TNAS PC could not find any device.

In case that “Cancel” was mistakenly clicked, please go to Windows Control Panel > Windows Defender Firewall > advanced settings > Inbound Rules, find TNAS PC, delete the rule for it and restart it. It will ask you to choose again, and click “Allow access” this time.