some say 64gb cards work. pnly way to know is to buy one and try.
I can't see as to how pointing out something that is not helpful and also quite self evident facilitates the user. It is reasonable to assume that cjebs asked here so as to avoid spending approx $70-$80 and, after it fails to work, having to deal with attempting to return item for refund.
cjebs - The 64gb cards use a different standard called SDXC, as opposed to the SDHC standard. We have a new 64gb Sandisk card here in the company computer lab, and I tried it in my wife's Galaxy tablet after reading your post. It
did not work. I made the assumption that the new card is known to be good; I will ask the department head tomorrow to verify.
I think the problem is twofold, the data rate is in excess of the device i/o cap and SDXC is not supported in general. Perhaps a driver will be made available in the future to make use of these new high capacity cards possible, however that is speculation without having full knowledge of what hardware limitations imposed could prevent driver emulation, and buffering of the transfer rate would also be necessary.
Finally, a personal preference for me is PNY brand MicroSD cards, we are currently using one,
32gb PNY MicroSD obtained from Walmart for approx $25. PNY is a good balance between value and quality. Go too cheap and you will deal with unreliability. Although I mentioned Sandisk above, only because that is what was in the lab, I personally avoid Sandisk at all cost ever since the U3 Launchpad scandal (many considered it a virus intentionally present by Sandisk.) U3 auto installation would not be an issue with an Android device.