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I was using my SD card on my phone. One fine day it showed a message that it was corrupted. I put the card in an adapter and plugged it into my iMac.

There was 3 GBs free

I was able to read and copied all I need. I decided to format it anyway and used disk utility to do so.

I renamed it to SD It said that it had finished erasing, but all the files were still on it.

Note that I changed the name to SD but it is still NO NAME

I tried deleting each folder. But when I ejected and put it back in, the files are still there. I can't format it via my phone either and I am too scared to use the terminal for erasing. Can anyone help me?

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It's dead.
Smash it to prevent your data being stolen & throw it away.

If a write error occurs, the firmware controller will switch over to read-only mode to prevent further data loss. This is to all intents & purposes, irreversible.

  • So I will be able to get all my things back from the card, even though it is dead? – Villyam Dec 18 '18 at 16:04
  • It will still be technically readable - though you won't know until you actually try it what damage has already occurred. It's not writeable, which is why after a format it's still as it was; for some reason devices think they can write to it but actually cannot. It's a common issue when they fail this way. – Tetsujin Dec 18 '18 at 16:08

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