Help with TP-Link Dual-Band BE3600
Recently purchased a TP-Link Dual-Band BE3600 Wi-Fi 7 Router (Archer BE230)
Have this device networked in the house with two PCs hardwired via Ethernet.
Have one hardwired to another building router,
Have a USB drive for photos/movies and drag & drop files.
Having issues in the external building as devices there (two TVs, 3 smart switches, a PC, and Alexa dropping out).
Also having issues in the house where the PC's frequently lose their signals and switch to wireless.
So I was thinking it might be two routers colliding.
I am willing to purchase an extender with a cat5 RJ45 port) to the external building therefore eliminating the 2nd router.
(The buried cable has worked fine for years, using it right now).
I need assistance:
What device to purchase?
How to configure it?
Thank you for any recommendations you may have.