Whether its your Desktop, Laptop, iPhone, iPad, iPod-Touch. Save your data on any one of your devices and it will be available in all your devices instantly.
Have a look on the video below to grab a better idea on the working of Dropbox.
Download Dropbox for your Windows, Mac, Linux, Mobile.
I use it for organising data of my office, home and all personal stuff. No Storage Devices, No Emailing of Documents to ourselves. Hope, you will surely use it.