[Dal]

Hi,

PS2 memory cards work in K bytes, PS1 memory cards work in blocks.

This means that when you save a PS2 game it only takes the amount of memory needed at that save point. PS1 games take blocks regardless of where and when you saved.

You use PS1 mem cards for PS1 games
You use PS2 mem cards for PS2 games.

Simple as that.

Cheers

Dal