SDHC vs SDXC (GB Storage Size) - The difference is size and technology. The HC's are 32GB and smaller, ship with Fat32 formatting. The XC cards are everything over 32GB and are pre-formatted with Microsoft's proprietary and patented exFAT file system. The SDXC format supports cards up to 2TB, which no one makes.

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You can try formatting the card with the exFAT file system. Microsoft's created it to alleviate FAT32's problems as flash media and file sizes get bigger and bigger. Sandisk's 64GB microSDXC card ships formatted with the exFAT file system, the GS3 can read it and I've copied 720p MKVs to it and watched them on the phone.

FAT32 has a file size limit of 4GB and FAT32 is what's used on almost all microSD cards by default.

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Just found this from user manual online
It says:

Insert a memory card (optional)
Your device accepts microSD
™
or microSDHC
™
memorycards with maximum capacities of 32 GB