I tryed saving Monster Hunter 4 on my gateway SD but it says that FAT32 doesnt go higher then 4 gigbt file size, so I converted the sd card NTFS. Now I can put the backup on the sdcard but gateway no longer reads the card 
a) I know I can convert it to .cia but then I would need to buy a bigger sdcard for my 3ds.
b) Is there a way to make the file smaller as ive heard of this being possible
c) Also is there a diffrent file system gateway uses other then fat32?

a) I know I can convert it to .cia but then I would need to buy a bigger sdcard for my 3ds.
b) Is there a way to make the file smaller as ive heard of this being possible
c) Also is there a diffrent file system gateway uses other then fat32?