They’re $265 CAD for each 10TB Western Digital Red Drives and I bought 4. They’re NAS drives and so they’re spinning platters and not solid state but it’s fine for my needs.
I also bought an i5 desktop with a 1TB NVMe drive, 16GB of RAM for $900 CAD that runs at PCIe gen 4x4 and with the unRAID OS installed, it’ll auto-tier between NVMe and the 10TB drives. Works like a hot damn and it’s cheaper and faster than a NAS from QNAP with the Celeron processor.