The term "disk space" is oftentimes identified as "disk quota" or "data storage", still all these words mean the very same thing - the amount of data that you are able to upload to a shared hosting account. The overall size of what you have is determined by accumulating the storage space consumed by all the content in the account, the most apparent being the types of files that you upload. Two other things are often disregarded by the majority of people, though - email messages along with databases. Big attachments and databases of larger script-driven websites can sometimes need a lot of disk space as well. To use a more common analogy, the disk space of your personal computer is taken not only by files that you download, but also by documents you write together with software programs you install. In the same way, various things are counted towards the hdd space your data employs on a website hosting server, not only the uploads.