I'll redirect you you r/DataHoarder [0] (+ r/Archiveteam [1]). It has a good selection on its wiki for general cases [2]

For harder cases, they will to happily help you (that's their hacking's speciality)

[0] https://www.reddit.com/r/DataHoarder/

[1] https://www.reddit.com/r/Archiveteam/

[2] https://www.reddit.com/r/DataHoarder/wiki/software/#wiki_web...