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Micro SD up to 64 GB?

D

dealcorn

Senior member
I am not familiar with Micro SD cards but recently I observe that both the new Yoga Atom tablet and also the Supermicro Quark motherboard support Micro SD cards up to 64GB and 32GB respectively. A quick glance at Amazon reveals Micro SD cards of 128GB are common. I do not understand why the Micro SD interface is size capped. Is there technical merit to this size limitation or is it solely to support market segmentation by Intel?
 
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SD is limited to 2GB, but really can do 4GB (2GB due to file system issues, but 4GB cards with standards-breaking FAT settings work 99% of the time).

SDHC is limited to 32GB. If SDXC is not supported, 32GB will be the max.

SDXC goes to 2TB.

If it supports up to 64GB, it will usually handle 128GB+ just fine, they just never bothered testing, because large SD cards weren't available during development. But, you of course don't have any assurance, unless someone else has tried 128GB or bigger, making it a risk, if you have no use but just for that device.
 
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