I can't really remember the system specs on my old 8086, but that was a hand me down to play games on when I was 5.
The first PC I really remember building with my dad was a 486 SX 33, and I think I had somewhere around 500MB storage on that?
Lets see, I remember having a 1.7GB Seagate that I had on my Pentium 133. The smallest drives I still own are 4 4.3GB Fujitsu 7200 RPM Ultra Wide SCSI disks that I picked up with my Dual Processor PII 400. Ran them in Raid 0 with my Adaptec 2940. Man, those were smoking fast drives. I'm still using those drives (in Raid 10 now) for an old SQL Server DB.