A coworker came with sad mood. His tablet microsdcard had failed.
As a good samarian I wanted to try my best to see if I could help.
The sdcard couldnt be mounted neither in windows nor in ubuntu. Photorec got read errors.
Wouldnt give up so I tried cloning the card with gddrescue to a imagefile and then ran photorec, and suprise, now It found all his lost pictures and videos.
Make a clone off the sdcard in ubuntu:
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sudo ddrescue -v /dev/mmcblk0 /home/user/image.img image.log
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Then make photorec recover files from the clone
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sudo photorec /home/user/image.img
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follow the onscreen guide.