I connected my external HDD to my TV and the TV did not recognize it. After that I can't open it on my computer any more.
fsck which kept asking more and more questions. Fearing that I would make the data impossible to retrieve by giving wrong answers (y/n), I stopped in the middle. The error message has changed since (it used to be about invalid fs type)
It wouldn't open on Windows either (Win 7 on VM). I believe the original format was NTFS
Error mounting /dev/sdb1 at /media/[username omitted]/28bc82aa-d4bd-459e-b071-16839167a6da: Command-line `mount -t "ext4" -o "uhelper=udisks2,nodev,nosuid" "/dev/sdb1" "/media/.../28bc82aa-d4bd-459e-b071-16839167a6da"' exited with non-zero exit status 32: mount: /dev/sdb1: can't read superblock
The data is very important to me and I don't have any other copy of some of it