Back in 1995/1996 Commodore should have for their low end machines used 3.5" IDE hard drives rather than 2.5". Bigger, Hotter? Yes. But much cheaper. Around that time a 3.5" 1.0GB hard drive was very affordable.
All Amiga's should have had a Buffered IDE as standard.
Even back in 1992 when the A600 and A1200 were released, those 20MB and 40MB hard drives were a joke and badly outdated. By then the standard in a PC was already 120MB.