What can I do if my Synology NAS does not show up in Network in Windows File Explorer?

For security reasons, some system settings are not enabled by default. This may result in your Synology NAS not visible in Network in Windows File Explorer. If your Synology NAS does not show up, we recommend making sure the following settings are configured properly on your Synology NAS and Windows computer.

To enable Windows network discovery to allow file access via SMB on your Synology NAS:

As of DSM 6.2-22259, the WS-Discovery service allows users to find SMB service on the Synology NAS via Windows network discovery. Follow the below instructions to enable:

  1. In DSM, go to Control Panel > File Services > Advanced.
  2. Under the WS-Discovery section, tick the Enable Windows network discovery to allow file access via SMB checkbox.
  3. Click Apply to save the settings.

Note:

  • The WS-Discovery service is supported since Windows Vista.
  • The WS-Discovery service does not support IPv6 on DSM 6.2.1.

To enable Local Master Browser on your Synology NAS:

When multiple Windows computers are located in the same subnet, they will negotiate and elect one computer as a “local master browser.” The local master browser maintains the lists of the other computers within the same subnet and their shared resources, as well as shares these lists with the other computers. This option allows the Synology NAS to assume the role of local master browser. Follow the below instructions to enable:

Note:

  • If Windows network discovery to allow file access via SMB mentioned above has already been enabled, you will not need to enable Local Master Browser in your Synology NAS.
  1. In DSM, go to Control Panel > File Services > SMB/AFP/NFS.
  2. Under the SMB section, click Advanced Settings.
  3. Tick the Enable Local Master Browser checkbox.
  4. On your Windows computer, go to Settings > Network and Sharing Center > Change Advanced Sharing Settings, and select Turn off network discovery in the Network discovery section. Save your changes.
  5. Select Turn on network discovery in the Network discovery section and save changes again to clear the DNS Cache on your Windows computer.

Note:

  • Enabling this function disables hard disk hibernation and activates the guest account without a password.

To enable the NetBIOS service on your computer:

Make sure you have enabled the NetBIOS service on your Windows computer. When the NetBIOS service is working properly, you should be able to ping your Synology NAS by its hostname. If it has not been enabled, follow the below instructions to enable on your computer:

  1. Go to Settings > Network & Internet > Status, and click Change adapter options.
  2. Select the connection you are using and click Change settings of this connection.
  3. In the This connection uses the following items list, click Internet Protocol Version 4 (TCP/IPv4), click the Advanced button, and click the WINS tab.
  4. Click Enable NetBIOS over TCP/IP, and then click OK for all the setting windows.

If the issue persists after trying the above methods, you can also use an Ethernet cable to connect your computer to the Synology NAS without a router or switch in between to prevent internet issues.

Article from: https://www.synology.com/en-ph/knowledgebase/DSM/tutorial/File_Sharing/What_can_I_do_if_my_Synology_NAS_does_not_show_up_in_Network_in_Windows_File_Explorer