Have you ever needed to move something from one computer to another? If so, then you have serveral options at your disposal. You could email it to yourself, put it on a flash drive, burn it to a disc, or upload it to an online location. All these options are fine solutions, unless you want to update the file from multiple computers. Each update will require you to re-email, burn, or upload and then re-download, unzip, restore, etc. This is a time consuming process, and though this may work for some files, there is a better way to sync computer folders.
Dropbox is a online tool that allows you to securely 'sync' folders on multiple computers. Not only does the Dropbox allow you to access and synchronize file updates on multiple PCs through an installed program but also it provides web access from any PC. So when you save a report or document for use in a presentation you can do so on Dropbox without installing anything on the client's PC.
Additionally, you can share folders with other Dropbox users or anyone else, by providing them with a public link. The public section of Dropbox is intened for sharing nonsecure data. However, the private section is secured through a variety of security technologies. Dropbox provides assurance that the files you store are safe, as long as they are not stored in the public section: "Your files are actually safer while stored in your Dropbox than on your computer in some cases. We use the same secure methods as banks and the military to send and store your data."
Dropbox has a few different levels of storage to match the needs of particular customers, but for the average user the free version will provide plenty of space.

The free version comes with 2 gigabytes of space, but is expandable to 8gb through a rather clever referral scheme. Each referral who signs up using your link will earn you..and them..an extra 250 mb of space. So if 24 people sign up using your referral link you will be able to store 8gb of data in your Dropbox.
Once you have installed DropBox, it will show up as a folder in your 'My Documents' now all you have to do is start saving files to the folder from any computer.

If you want to get an extra 250 mb of storage space when you signup for DropBox use the following referral link: https://www.dropbox.com/referrals/NTY5NTAzNzI5