1. i want to backup the my site http://pcserver/mysite/default.aspx
my syntax for backup is
"stsadm.exe -o backup -url http://pcserver/mysite/ -filename
c:\mysite.dat"
but i got the message "The specified URL is a not a top-level
website. The backup and restore operation work only for top-level
websites...."

--> a. Is there a way to backup subsites without backing up the whole
site?

2. Let's say that i have succesfully created a backup
using "stsadm.exe -o backup -url http://pcserver/ -filename
c:\mysite.dat". When i tried to restore it to the same
site "stsadm.exe -o restore -url http://pcserver/ -filename
c:\mysite.dat". I got the message that the site address is already in
use.

--> a. do i have to delete the site http://pcserver/ and create a new
one just to see it can be restored? how?

3. Are the documents in the document library included in the backup
file?

4. If i deleted all files in the document library after the backup,
will the document library be re-populated when i restored succesfully?

5. I created a backup of my site using stsadm and smigrate; stsadm
yielded a 20mb backup file while smigrate only produced a 5mb file.
why is it so?

Sorry for all the questions, i'm very new to WSS.