On most of the keyboards, actually I think all of them, they support only the 8 digit file system example

Whenthes.mid

But in windows you can now name midi file as so

When_the_Saints_come_marching_in.mid

Can the SD-1 or any keyboard do this or have the ability to.

It really gets hard to name and figure out which file is what with only 8 characters

Just asking and complaining Frank