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Are there micro SD cards that work and micro SD cards that don't? #623

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Armaghansony opened this issue Mar 13, 2023 · 0 comments
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@Armaghansony
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I noticed that when using microSD cards with the Spresense expansion board, some can be used and some cannot.

SanDisk Ultra SDSQUA4-032G-EPK and KIOXIA KCA-MC016GS are not recognized when inserted into the expansion board, while Transcend 2GB TS2GUSD and Toshiba 16GB MU-J016GX microSD cards can be used.

I have confirmed that the BtoB connector is connected when using any of the microSD cards, and the PC can recognize and handle any of the microSD cards.
Also, they are all SDHC micro SDcards formatted with FAT32.

Why are some of these same micro SD cards available and others are not?

SanDisk Ultra SDSQUA4-032G-EPK (SDHC class 10) ×
KIOXIA KCA-MC016GS (SDHC class 10) ×
Transcend 2GB TS2GUSD (SDHC)○
Toshiba 16GB MU-J016GX (SDHC class 10

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