For that reason is only recommended 32kB for lower size SD cards (64GB or less) and 64kB for larger ones (128 or above).
16kB or less cluster size is never recommended
On the vita you shouldn't use 32kb cluster where you should use 64kb instead due to the system showing incorrect size, I can't vouch for 64kb for the 3DS as I never really used that cluster size for the 3DS, but I don't know as since @TurdPooCharger recommend it for 128GB and above.
Last edited by Hayato213,