Micro SD card.

Any reason a Galaxy light can't handle a Samsung 64GB SD card?
Often times larger sd cards and Samsung devices don't play well. This might not be the case for every brand sd card, so you'll need to do some review searching to see what everyone says about the particular sd cards in that capacity.

Let us know what you find out and if you have any issues.
 
I have had the worst luck with microSD cards in my Galaxy Light. It has ruined two 64GB cards. Won't work in the phone. Can't read or format them in a PC. The SD card feature in the Galaxy Light SUCKS!!!! I am going to try a 32gb Samsung card. I hope I have better luck with it. I already ordered it and can't cancel. It kind of disturbs me that you can't get a Samsung 64gb card to work.