SugarSync and Dropbox (both free) are two of the most well-known cloud storage apps available for the iPad. Both allow you to upload files or photos from your tablet and access them later on another device, such as a computer or your iPhone. Whether you opt for SugarSync or Dropbox really depends on what you want from your storage provider. While both apps have their strong points -- Dropbox offers better security, while SugarSync has a better sharing model -- those looking for easy-to-use file storage are probably best suited with Dropbox; tech-savvy users who need some additional features will probably be happier with SugarSync. [source: Smollinger]. Whichever one you choose, you'll have the option to access your files wherever you go.
Cloud storage means that you're saving your files to a remote database. That way, you can save and retrieve data from any computer or device with web access -- and you don't have to carry a memory stick or external drive. Check out How Cloud Storage Works to learn more.