The ST-412 10MB full height 5.25" HDD (redhill.net.au)

see also: https://retrocmp.de/hdd/seagate/seagate.htm

I'll never forget the sound of those old 5 1/4" full height drives:

<thunk> whiiiiiiiiiiirrrrrrrrrRRRRRRRRRR <chk><chk>

...and don't forget to park it when you're done!