My main advice would be to get multiple hubs, because your 6 drives would share the same bandwidth. Also hubs with more than 4 ports are in fact multiple hubs chained together because most chips in hubs handle 4 devices at most. So it would be better to spread your drives on as much USB ports as possible.

I got this one:

https://www.kensington.com/p/products/device-docking-connectivity-products/usb-connectivity/uh7000c-usb-3.0-7-port-hub-charging-K39123AM-SP/

combined with a usb-c to micro b-ss cable so I can directly plug it into an usb-c port (it ships with an usb-A connector only).