billaustinthey call me Mr. BillPremium,MVM
North Las Vegas, NV
Read the links provided. You need to setup port forwarding on the 192 router so FTP requests are sent to the NAS IP. Use the WAN IP (10.x.x.x) of the 192 router as the FTP address for the camera to connect to.
If the router supports it, instead of port forwarding, you can add a second 10.x.x.x address to the WAN port on the 192 router and do a 1:1 NAT between the second WAN IP and the NAS IP.
Either way, once configured correctly, will allow FTP connections between the 10 network and the NAS device on the 192 network.