[i9505 4.4.2] does stock micro-sdcard encryption support EXFAT?

[AC Question]

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

 

[Rukbat]

It could have something to do with the default cluster size being 256KB. I don't have a spare large enough card to try it on, though. Maybe formatting it with an 8KB cluster size would make it work on a 2GB card. (You certainly won't run out of table size with such a small card, even with really small cluster sizes.)