Check if your user account has the permission to access the shared folder.If the shared folder you want to access is encrypted, please mount it at DSM Control Panel > Shared Folder:.Check if the shared folder you wish to access is listed at DSM Control Panel > Shared Folder.

Make sure the shared folder has been configured properly on your Synology NAS.

Make sure the volumes are in Normal status at DSM > Storage Manager > Volume.

If you must set up port forwarding rules to access your Synology NAS over the Internet, please make sure to use SMB3. We recommend using VPN as an alternative to connect to your Synology NAS ( Tutorial). Note: Exposing SMB ports to the Internet can be a security risk. SMB file service uses network ports 137-139 and 445.

If you wish to access your Synology NAS over the Internet, make sure port forwarding rules are set up properly on the router ( Tutorial).

Check if your Synology NAS and client computer are in the same local network.

You can refer to this article if you need to resolve any hardware malfunctions or network connection problems.

Check the hardware and connection status of your Synology NAS.

Make sure Synology NAS is working properly.

If you have trouble accessing a Synology NAS shared folder mapped as a network drive on your client computer, please try the following steps on your Synology NAS and client computer to identify and resolve the problems.

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