@peltsi51 Strangely, but now it works. 1. I tested to connect with hardwired from main deco and satellite decos. Didn't work. 2. I remembered that the NAS has it's own firewall. I set the new subnet...

@Alexandre. Yep. I can try that tomorrow. One dum thing to test is to change the subnet back to 192.168.68.*. It should not do anything but you never know. Thanks for the help so far.

@Alexandre. Yep changed it to 192.169.100.xxx I can see the nas as connected in the deco app as it should. And also I can connect to the nas through the qnap cloud connection.

@Alexandre. Other one is .249 and other one is .250 same subnet as main deco and nas.

I changed my old router to Deco X50 mesh. Deco main unit is connected to modem, one deco is connected to main unit with ethernet backhaul and other one is connected with wifi backhaul. The QNAP NAS...