Also, make sure NAS is set to get dynamic IP address, check its default gateway when it does - should be Main Deco. Same for PC you will hardwire and will be pinging from. Many issues with Deco mesh...

@peltsi51 Obviously, you should be able to at least ping NAS if it is connected to the router (Main Deco) and you are pinging it from device on the same LAN. Do you have any device with Ethernet...

@peltsi51 Default Deco subnet is 192.168.68.*, I believe. Have you changed it to 192.168.100.*? Do you see NAS in the list of devices connected to Main Deco, in Deco app?

@peltsi51 Check IP address of Satellite Deco (hardwired or wireless) that you should see in its info page in Deco app. What is it?

@Mar3i For outdoor Deco units use Deco X50-Outdoor. This is the only choice. Can you tell Deco model name for AX3000? Is it X60, X55, X50? This will help with further recommendations. How many Deco...

@FutureBoy Deco M5 is very good WiFi5 mesh unit. I have them and I like them. If you need more, you should not delay: they are becoming End of Sale. Order as many as you need as soon as you can. It...