Amazon S3 Backup

Hi,

long time ago I had an Amazon S3 backup scheduled via Virtualmin for all domains.
Everything was OK.

yesterday I downloaded the backup file to recover a a domain.
the backup file name was domain.com.tar.gz
i’ve exported it with 7zip.
i got an domain.tar file
i’ve exported it again with 7zip
than i got many folders with nummers such as:
13324350477
13324635005
13326547553

what is this? never seen this before, it should be :
public_html
Maildir
ssl

etc…

whats wrong?

Can someone look at this issue please!