Fedora 26 or Ubuntu 14.04, I get an function error. Fedora 34 or Ubuntu 20.04, I get an malloc error. Even if subfolders don't work, would be amazing if I could run this for example on /Pictures, get all the files that were in there, sorting them would be easy compared to photorec. Even though it's really old, the one feature that made me try it is that it's able to restore files per folder. With testdisk, it does show the deleted folders in root, but they are empty, no subfolders, no files.

Unfortunately, as it's the nature of photorec, there is nothing left of any folder structures, and the amount of files is close to being unhandable. Best results I got for now was with photorec.

I instantly made a image of the important ext4 partition, and then tried to recover data: Everything gone, textbook worst case scenario. Even my backup drive that was connected at that moment was totally wiped. Some months ago the unthinkable happened: I wrote a (shitty) script that seemingly ended up running 'rm -rf *' on the root directory.

Testdisk ext4 undelete