I have a device connected to this travel router via the LAN port in client mode. I also have a PC connected to wireless network that the travel router is connected to.

My PC can ping the router but not the device. The device can ping the router and the PC.

I need to access the device through the network to share files, is there any reason why I can ping the PC from the device but not the other way around?

My network knowledge is limited but I feel like this could be security related, is there a way to bypass this?

Thanks