DropBox is a file transfer, file synchronization and storage solution that is designed for personal or business users looking for a secure and easy way to transfer and synchronize files using the Internet. The most distinctive features of the service are the program that you download to your system that allows you to access your account from your computer icon tray and from a web-based interface on any system.

In addition to these features, DropBox has the ability to upload and download the only the parts of files that are changed once a file is in the system, instead of completely reuploading or downloading the whole file, and your files are encrypted when stored or transferred. DropBox has a free account with 2GB of storage and a Pro account with 50GB of storage for $9.99 per month or $99 per year

Strengths: Your files are stored and transferred with DropBox's 256-bit encryption on multiple servers to ensure your data is safe. DropBox works with Windows, Mac and Linux PCs and creates a folder on your system while providing internet access to your files. It has a clean and simple interface, with the downloaded program automatically updating itself to keep you current.

Weaknesses: This service doesn't seem to support multiple users on one account and although you can share files and folders, companies would need an account for every necessary employee. With Pro accounts costing $99 per year, the cost to businesses could be very expensive and not as feature-heavy as other services. There is also software that must be installed on your computer to access and use DropBox.

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