Hi@Laurencewhite ,

Welcome to our community.

May I know if your network topology diagram is as follows:

ISP modem—router )))((( client devices

(Note: — stands for wired connection,)))((( stands for wireless connection )

Have you tried a different NAS device? 

To access the NAS from your local network, you need to connect the NAS to your router via a wireless LAN or Ethernet cable. 
To access the NAS remotely, you may need to open a UDP/TCP service port for the NAS on the router and then access the NAS remotely using a public IP address. Please review the following FAQ for configuration: Port forwarding: how to set up virtual server on TP-Link wireless router?

Hello@Laurencewhite ,

Thanks for getting back to me.

I am so glad to hear that your issue can be resolved. Please enjoy the Internet!