The plugin works fine and I am very happy with the documentation. I selected to retain 2 backups, expecting that at each new back-up the older one would be deleted and a new one added. On checking I found that I have 2 backups, but with the second made immediately after the first, per my check of file dates and times on Google Drive. Is this the way it always works, or can I retain an older backup? If not what is the point of making multiple back-ups?