Hardkernel offers an M.2 card with 6 SATA ports for €32. It looks like you could use three of these cards + an M.2 nvme ssd (for boot) to turn this into a massive 18 HDD storage server.
Hardkernel offers an M.2 card with 6 SATA ports for €32. It looks like you could use three of these cards + an M.2 nvme ssd (for boot) to turn this into a massive 18 HDD storage server.