Also the interfaces are all over the place, PCIe, SAS, SATA, NVMe (which is PCIe?), M.2 with double PCIe?! with all kinds of connectors...
We have a serious problem with storage of data when magnetic tape is still the real solution!
HUS - hgst uktrastar standard
MH - MLC high endurance (4PB is claimed for the 200GB drives, verified this by looking at the lifetime counter and the bytes written)
4020 - max spec 400gb, device is 200gb
A - generation
S - 2.5" formfactor
S2 - 12GB/s (sas3), dual port
1 - probably means custom spec all my hgst former netapp/sun/oracle drives have this set to 1 both SSD and hdd
0 - crypto sanetize
Haven't seen them a lot on eBay last month but caching drives with low percentage writes do show up from time to time in batches.