@Jan_Schrik 

Hi,

Is your network map like this:

Ziggo Modem---main Deco M5----C7(AP mode with Wi-Fi/DHCP off)---<cable>-----Windows10 PC+ NAS(wired to the C7)

The current issue is:

Wireless clients are all able to access the NAS; While the windows PC could get internet but not able to access NAS？

If yes, could you please help me check the following information:

1. What are the hardware as well as the firmware version of the C7?
2. Are you able to ping the IP address of the NAS on the PC---can I have some pictures?

Thank you very much and wait for your reply.

@Jan_Schrik 

Hi, if unplugging the C7, connecting the NAS to the second Ethernet port of main Deco,  connecting the laptop to the Ethernet port of the satellite Deco(or the wireless network of Deco);

Would both PC and iPad be able to access the NAS?

Thank you very much.