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I'm trying to format a SanDisk 16GB microSD card but when I do I keep getting the following message:

One or more partitions are busy on /dev/mmcblk0

How do I correct this so that I can properly format the card? I've tried formatting it with GParted but it never makes it past the second step.

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1 Answer

try umount it first. Use the new utility that comes with ubuntu , its name is disk utility or something like this.

or try open a terminal and do

sudo mkfs /dev/mmcblk0 -t ext3

or -t vfat if you want to use it on windows

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