> I also want to set up a NAS on a mini-PC with some sort of attached external storage, but I haven't been able to get past this blocker You could also buy a P

> I also want to set up a NAS on a mini-PC with some sort of attached external storage, but I haven't been able to get past this blocker You could also buy a PCIe to multiport SATA (RAID) card, but you'll also need a bigger[1] NAS-like case[2] to house the hard drives and multiple power cables for the drives 1. Depending on how mini your PC is and how many drives you want to attach to it 2. I have noticed any case that's sufficiently NAS-like (hotswap trays) is sold at a premium.