I suggest you have you dimensions wrong.
My early 90s PC had 4MB of RAM and 116MB of disk. I recall hunting down and paying a lot of money to upgrade to 8MB of RAM. I did manage to get by with 116MB of disk, I did a dual-boot Windows 3.1 with Slackware with a shared swap partition to make it all fit in 116MB.
Also around that same time, I recall my PDA, I paid extra for a 64KB "SD" card which is about the same physical size as today's 1TB SSD.
So a 90s PC with 256MB of RAM seems wrong.