Yes, you can do multiple backups to an external drive, thats how I do mine.
Just make sure that the machine names are not the same since the backup will
be renamed after your machine in a folder.
It's like writing any file. If you give it the same name as an
existing file, it will overwrite the existing file. If you give the
backup a different name, it won't.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.