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Adventures with a 64GB uSD card

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By DeanGibson, Senior Member on 18th January 2017, 12:08 AM
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Noticing that the Nook HD+ manual states that the Nook (hardware + B&N software) supports up to a 64GB uSD card, I decided to upgrade my HD+ running CM-11 (running the 2016-08-15 nightly) to a SanDisk 64Gb uSD card. I formatted it (exFAT) on the PC and (on the PC) copied the old 32GB (FAT32) card to the new one, and inserted it into the HD+. It did not work (readable but errors when writing).

However, by accident I inserted a 32GB card freshly formatted for NTFS, and noticed that CM-11 created a LOST.DIR directory, indicating that it recognized and accepted the NTFS drive.

To make a long story short, after some testing, I reformatted as NTFS the 64GB card, and copied my previous uSD card files to it. It appears to work fine!

I assume that this is a CM-specific feature, and that regular Android manufacturers are sticking with the exFAT support for larger uSD cards.
19th January 2017, 06:18 AM |#2  
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Hey Dean o/ I recently resurrected my HD+ and tried out all the CM ROMS 11-14, and didn't have any trouble with an empty exFAT 64GB card. It could be that something coincidentally got corrupted in the first transfer. I did have to reformat my card in Windows after downgrading from Marshmallow/Nougat to Lollipop, after letting the newer systems link the card to internal storage. CM 12.1 wouldn't offer to format it for me.
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