Cloud storage service(SAAS - Storage As A Service) is getting more popularity in these days. Dropbox is one of the popular free cloud storage available. A tutorial written by Mr Gary Newell, lists the steps to be followed for installing Dropbox client in Ubuntu 15.10.
See complete tutorial in about/linux portal.
If you often need to share files between your home and your office you may be used to carrying around a USB drive with all of your files on it or you might carry a heavy laptop around. With Dropbox you can upload the files to your own account area from your house and then when you get to your place of work you can connect to Dropbox and download them.When the working day is done simply upload the files back to Dropbox and download them again when you get home.
See complete tutorial in about/linux portal.