SD card won't format with w10m?

[daniel cooper2]

I tried different SD cards in my 640 but it won't format correctly. Both are 32 gigs one is class 6 and the other one class 10. The phone only shows them both as 15mb after I try to format them to my phone. Can anyone help please????

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[pankaj981]

It could be that the card is corrupt? Connect to a PC and try formatting from there (exFAT or FAT32). You can also try diskpart commands to perform a slightly lower level format.

Diskpart is the way to go TBH:

How can I reformat my SD card to use it normally again? - Raspberry Pi Stack Exchange