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2013-09-25 12:38 AM
I put a brand new Kingston 64gb card into my Z1 and it worked straight away, it is formated exfat
I suspect your card is faulty - have you tried it in anything else
and I've never heard of that make before
2013-09-25 01:40 AM - edited 2013-09-25 01:41 AM
SDHC are suppose to be formatted with FAT32, SDHC standard supports max of 32GB capacity.
SDXC (64GB and more) are always exFAT formatted out of the box, otherwise they cannot be used.
you can easily find out the filesystem by inserting the card to any SD reader (USB stick or built in laptop's reader) and checking it's properties on the computer (Windows XP with exFAT patch installed, Vista SP2+, Windows 7, Windows 8, some modern linux distros).
If your card is 64GB it should be formatted with exFAT filesystem, it is designed for exFAT, otherwise it might not work at all.