Erwan

Ps : English version of the topic: Good morning I have a large archive from 2018 in ".7z" format, 18.5GB in size, which won't open. I'm getting a message saying "this is not an archive"... What could I do to recover this valuable data?

Okay, I tried, but I can't access it in the "hex editor".

Ah, I just found the info in the FAQ, I'll try that first!

Corrupted archive "This is not an archive"