I have usb 2.0 though, so it’s gonna be slow ~no matter what😭. I get ~15MB/s on average and it can reach ~40MB/s with wifi hotspot, while usb goes at about ~6MB/s on average and can reach about 30MB/s.
The issue are the small files. Wifi handles them much quicker. Especially listing folders with thousands of files. Opening my camera directory (~8.500 files) with wifi takes about 5seconds, while with usb it takes about ~1-2minutes…
About nas, I would too like to have one and automatically backup everything there. I might build one some time.