by Joanna Beaver.
Just to close this off, I found the correct web server path, added the target directory to the end of that path, and now have fully functioning automated backups saving themselves in the file specified. Thanks Emma for your support.
Here is a link that is specific to my hosting provider (this is by no means an endorsement of them!) but may help others find the correct pathway or at least point them in the right direction for what to look for.