It’s not the size of the card, so much as it is the SDXC format. This is a brand-new format that only XC-compliant devices will read. And they are few and far between at this stage of the technology development game. You’ll most likely have to update your computer, and/or wait for the rest of the industry to catch up to this latest advent.
Theoretically, you could re-format it to NTFS for more compatibility with other devices until that time, but this is impossible if you can’t connect it to a computer that can do that in the first place.
