Mini rack bod

So I have a a mini rack.

I have about 1.5 U of rack space and a model for a 4 bay 3.5 inch BOD

HOWEVER, no idea how best to connect them to a computer.

I'm thinking right now just plugging them into a Think center m715 with a powered USB hub.

I'm also thinking get a Raspberry Pi 5 and a nvme to sata hat, but I'm not aware of a way to power those 4 drives other than extra internal power supply. It would be convenient to just use like a wall wart or USB 2 power.

Thoughts? Best practices?