why not choose Archer A7, it sounds more great https://www.tp-link.com/uk/products/details/cat-9_Archer-A7.html

I think you shall provide some more detailed information such as model of your access point so as to get some ideas

firstly you shall have a device support 5ghz, then make sure you have enable 5ghz radio and ssid broadcast on the router

system tools > firmware upgrade

well done, the gateway is just like the next hop, we had to appoint the other router so that message can be sent to it

serjflint wrote I have router TP-Link Archer C20 (RU) v4. When downloading files on speed less than 50 Mbit/s everything is OK. I purchased package from my provider with the maximum speed 100 Mbit/s...