Review on 💾 Geekworm X820 V3.0 USB 3.0 Mobile Hard Disk Module - Storage Expansion Board for Raspberry Pi 3 B+/3B with 2.5 Inch SATA HDD/SSD Support by Jason Holt

I am currently using this in conjunction with a separate case for the Raspberry Pi 3 B+. Everything fits together well and seems to be working well, except for the built-in WiFi PI. WiFi stops working as soon as you connect the USB bridge from the 820 hard drive board to the RPi. Wi-Fi works fine when both the HDD card and the RPi are on top of each other, but as soon as you connect them together via USB, the network crashes. Again, they work fine when both are on but not connected together, so I know it's not an "EMI" issue as the manufacturer suggests. I ended up having to buy a separate Wi-Fi dongle to make this setup work. Not sure what's going on, but somehow this 820 board hardware is messing up the built in WiFi PI.