I bought my first computer used, it had a 300MB external HD.
It went out just as I finished a project that I contracted for $600.
The replacement drive was 600 MB and cost $600.
I still have that Mac.
My current computer has 2.25 TB of onboard storage and it’s 85% full.
Wild times...
I built a Windows 10 computer recently. I put a stack of Western Digital Red (for NAS) drives into the Storage Spaces application. My family has 10TB of storage to use. We broke 3TB recently (mostly ripped movies and a LOT of pictures). I do remember seeing a Compaq computer in Sears back in 1994 or 1995 with a 1GB HDD—it was enormous!