I used this SD-card for 3 months in my Android device. Now my phone tells me that it's "broken" and needs to be formatted, yet the format fails on the phone.

Ubuntu won't recognize the card at all. (tried sudo fdisk -l) Although the Card-Reader works, as it was able to read and write on another card.

Is there any way to format it or even restore some data?

  • 1
    Maybe the card hardware and internal software are good, maybe not. If 'only' the partition table or the file system is damaged, you can repair it. Otherwise it is probably damaged beyond repair with tools available to normal users (like you and me). See this link and links from it, ubuntuforums.org/…
    – sudodus
    Jun 12, 2017 at 11:42

1 Answer 1


After inserting the card, run dmesg in a terminal, to see if the card was detected at all. I in doubt, try with your working card to see what output to expect.

If you dont see it in dmesg output, it is broken. Buy a new one.

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