Help does Samsung's stock encryption for external sdcards support EXFAT?

[EncryptedSGS4]

Samsung Galaxy S4 stock roms support EXFAT on external sdcards (the cards mount just fine).
However, I would like to know if the external sdcard encryption, featured in Samsung stock roms as opposed to aosp roms, also supports EXFAT

I tested the encryption on a EXFAT formatted 2GB microsd card. It didn't work, but this is probably due to the fact that it does not make sense to use EXFAT on a 2GB card. I haven't been able to test on 64GB or 128GB cards yet because I do not own one of these.
I would appreciate your help in this regard. Thanks

 

[Pugs1957]

The U.K. Samsung Galaxy S4 manual says on page 15:

The device supports the FAT and the exFAT file systems for memory cards. When
inserting a card formatted in a different file system, the device asks to reformat the
memory card.