@MikeS21 Hey, thanks so much for the detailed reply. I've done this before, and tried it again - I stuck a small 64 GB USB with music only, shared it on the router. And again - the same message...

@IrvSp there's no Windows involved. I tried both Access Authentication ON and OFF - no difference.

@Kevin_Z Hey, thanks for replying. Here there are 2 shots of the router config, and one of the iOS "Remote App" (Pioneers').

Recently started using an external HDD, plugged in the USB port of my AX50 as a NAS... OK, all devices on the same network do see the TP-Share... I both write and read files thru my computers. But...

@Carl and one more: Is there a real chance for devices, which are not WPA3 certified at the moment of the purchase, to get a firmware update with the WPA3, when it's already largely adopted?

@Carl Thanks for replying, Is Homecare accessible via Tether? Is it user friendly in terms of frequent option changes, monitoring, etc.? It's true that home smart devices are not WPA3 certified, and...