The disk space feature shows the overall amount of information that you can have on the cloud hosting server at any time. With a desktop computer, for example, this is the overall size of one hard disk drive or the total capacity of all of the hard drives in case that your PC has more than 1. The same way that the space on a personal computer is shared between installed computer programs, docs, music etcetera, the server disk space is ordinarily shared between website files, databases and emails. Every single file, folder and email message takes some space on your server, which means you should consider various factors, not just the size of the files which you upload. For instance, getting sizable email attachments or using a script-driven website where the user-generated info is kept in a database will also affect the space you're using.