Try setting up OpenWRT on Raspberry Pi to access intranet services (NAS, Web, USB Printer, BT Cloud Drive, etc. for offline downloads...) ）
This incident started around 2013 when I bought a Sony laptop and got a TPLinx841 router as a gift. Possibly back in 2016, this router started occasionally disconnecting. Many forums summarized that the domestic version of the router had severely reduced hardware: USB and Flash were cut, RAM was cut in half. During research, I also learned that hard and software modifications can be made: swapping memory chips and flash memory, flashing OpenWRT, etc.