If some of you are facing WiFi interference while using a hard drive or USB Stick, read this post I’ll leave here, I was struggling with that for so long and here I posted my solution: Beryl AX firmware 4.4.6 connection issues and feedback
All you need is a USB 2.0 extension cable, and optionally a short USB 3.0 shielded cable with ferrite core, and for better performance and durability use an aluminum USB Stick. I can post the link of the shielded USB 3.0 cable I bought.
Connect the USB 2.0 extension to the router and connect the USB 3.0 cable to the USB 2.0 extension, then connect the USB Stick/SSD to the USB 3.0 port on the USB 3.0 cable.
Working like a charm, absolutely zero interference even with the USB on top of the router, magic.
Trust me, this issue was driving me crazy lol because I use SMB to share files really often