Every 15 days I need to do a full backup of the directory. But I have seen that when I have done the 2nd backup, this deletes my 1st backup.....Is not possible to store all full backups?
I think that is important keep previous backup if any file backup is corrupted. It is a basic characteristic that should have. I understand that it is a reason for commercial motives .... but for example it might keep 2 previous copies for safety