Question: can i use sdhc instead of sdxc?
Answer: Most readers and host devices built after 2008 should be SDHC compatible. ... Because SDXC uses a different file system called exFAT and it works differently than standard SD cards, this format is NOT backwards compatible with host devices that only take SD (128MB to 2GB) or host devices that only take SDHC (4GB to 32GB).