DropBox is a fantastic service that allows to access and share photos, images and files anywhere. You can sign up for free and get 2GB of storage in ‘the cloud’ though 50GB storage only costs $9.99 a month. This is incredibly useful for web developers who travel as it allows you to store important files and backups online and access them anywhere in the world without having to take a portable hard drive with you.
Michael De Wildt has developed a wonderful plugin that automatically backs up your WordPress website to DropBox. You can determine where the backup is stored in your DropBox account and have a copy of the backup saved to your own hosting account too. You can also set the frequency of the backup and set how many backups you want to keep at a time before they are deleted.
Michael has admitted that there is currently a problem with the plugin working with installations that are larger than 50mb in size though he is working on a solution for this. I still believe that VaultPress is the most reliable backup service for WordPress though this plugin provides a great free alternative. Another DropBox plugin is available that syncs images from your blog to DropBox though I much prefer Michaels plugin as it backs up everything.