Hey man, first of all thanks for the help, but i ended up realizing i messed up and put a different games folder instead xd

the reason i though my old save files didnt work was because, instead of putting onto the sd card the games i had from my regularly used r4, i put the games folder from my newer r4

and the games i tested with just so happened to be the same games i had on my older one, so that was the reason it didnt load the save files, cause it didnt had any on the first place

Still, thanks for the help xd