FTP data transfer not working on GS110TP

Thanks schumaku for your reply.

I am a noob in networking. I have no idea if this GS110TP smart switch is " simple L2".

I am trying ftp connections through windows explorer ( from a pc which is on the same subnet) connected in the same subnet. The NAS has IP address as 192.168.XXX.104. My PC has 192.168.xxx.125. Gateway IP address Eero router 192.168.XXX.001.

Previous to these switches and router, I used TP-Link router. I connected through double NAT ( two routers) and it worked fine and awesome. Now I removed second network and pulled my wireless option from second NAT to first one itself. My ISP gave these Eero mesh wifi devices. One Eero is my router, second one is my mesh/repeater. Both produce wifi signals.

I tried with Eero customer service and they said the router will open the data connections like a regular router. Now only change is the switch. This switch is managed, so that's why questions pop up. It has lots of features and options which I thought might want to ask if these switches blocking the connections.