Hacking Some nooby questions =]

[ShAdOwFuRi]

Hi!

Just had a few questions regarding flash carts that i wanted to clear up.

1. Formatting my microSD card, when i format my microSD what is the optimal format that it should be placed in?

2. Save files. Say I'm currently using an R4, but want to switch to a CycloDS or Acekard2, what should I do with my save files. Will they still be compatible with the new card and its simply a matter of drag and drop. Or must I convert... or do I have to start again T_T

Thanks in advance =]