This plugin is pretty simple. You can use Dropbox or Amazon's S3 to store WordPress.

Need an account? Visit: Dropbox

Or, Amazon's S3 can be used, for that visit: https://s3.amazonaws.com

You can also use an FTP account. It is highly recommended that you use an FTP account that is truly, meaning separate domain name (and more importanyly, separate a IP address).

If this directory is writable: These files will appear there:

  1. wpTimeMachine-content-files.tar.gz
  2. wpTimeMachine-data-files.sql.gz
  3. wpTimeMachine-htaccess.tar.gz [1]
  4. wpTimeMachine-Instructions.txt [2]
[1] if you're not using .htaccess then no, it won't be created
[2] if you're ever recovering from a catastrophic WordPress failure, this file will help
It's a good idea to store the following two items on your own, (in the same place as the files above).
Your copy of WordPress:
Your copy of wp-config.php For security purposes this file is not backed up!