Backup.7z
However I noticed that this does not work if -p -mhe=on is present. When it's present, the 10GB file backup.7z is unchanged and a new temporary file is created that will eventually reach 10 GB too (thus we need 20 GB on this disk; this will be a problem if one day I want to do a 500 GB archive). At the end this temporary file will replace the original one.
backup.7z
041b061a72