Ubuntu One is a web application that helps you manage your files and data through synchronization between devices by installing Ubuntu and Ubuntu.
The file manager is easy and you have basic functions you need: upload, download and delete a file. You can also publish your data to the public to share it with others.
There is also a note manager, in which there is a list of notes and an editor to add a new note, or modify existing ones.
The communication manager goes along the same line, although there are more specific controls in it, including an alphabetical index, a change history, and a tool for mixing contacts.
Ubuntu wants to be one of the more comprehensive online storage services, and at the moment, it looks like the right track.
Free to store up to 2GB, after which you can pay for more space.