Dropbox is a file hosting service that offers cloud storage, file synchronization, and online collaboration.
I store all of my genealogy files in Dropbox. I use Dropbox because it provides access to all of my genealogy files regardless of where I am. As long as I have an internet connection I can access every single file in my Genealogy folder.
In the "olden days," all of the files and folders on users computers were only stored on the hard drive, and that hard drive was only accessible if the user was sitting in front of the computer. If you only had a desktop computer then you would never be able to access your files from anywhere other than at that computer.
Cloud computing provides users access to their files pretty much anywhere they have an internet connection.
Stay tuned for more details on how I use Dropbox.