Found a 10GB, 5 1/4" Quantum Bigfoot HDD. Connected to a PATA to USB adapter, and it works! : r/LGR
HDD: Quantum 1280AT BF12A011 BigFoot – システム管理メモ
Vintage - Vintage Quantum Bigfoot 525 Series 2.1GB Hard Drive from 1997 was listed for R595.00 on 27 Jul at 09:01 by CapeCollectables in Cape Town (ID:561043242)
QUANTUM BIGFOOT INTERNAL HARD DISK DRIVE HDD TS 5.25 SERIES | eBay