Brgor

Check out the Culture series by Iain M Banks

That's a SAS connector, but unfortunately it won't work with your computer without a SAS card called an HBA or Host Bus Adapter.

Check out Framework if you haven't already! https://frame.work/linux

They're designed to be upgraded and repaired over time so they're super modular. You can also save some money if you're not afraid to put it together yourself.