I overheard my wife saying about getting lots of different things in her slot even though they were all different sizes. This must have been what she was talking about.
These were the ones. https://en.wikipedia.org/wiki/Microdrive The first 1GB SD-Card that I bought set me back 54 notes, later I bought a 2GB SD-Card when the prices dropped but then discovered that my expensive 24" Dell 2407WFP (£415) Monitor with built in Card-Reader could only read up to 1GB cards. What a pisser but got one from Banggood that did HDSD-Cards for something silly like 7p.
I have an old Card-Reader that can read 54 card types including the 1GB mini hard-drives.
Now i need to find some SD card deals (lol)