Drobox is an online storage service and it offers 2 GB free storage space. "Dropbox allows users to create a special folder on their computers, which Dropbox then synchronizes so that it appears to be the same folder (with the same contents) regardless of which device is used to view it. Files placed in this folder are also accessible via the Dropbox website and mobile apps". It is very convenient to store Koha database backup in Dropbox cloud storage. No need to copy Koha data base in pen drive everyday.
Install Dropbox client
Create Dropbox account. Download Dropbox client application from here. Ubuntu users can install the package using the command;
sudo dpkg -i dropbox*.deb
After the installation of the package, open the client from Applications > Internet > Dropbox
Sign in the Dropbox account after finishing the installation.