Each time you upload information on a web hosting server, you will need a certain amount of storage space on the hdd depending on its size. In case you operate a script-driven internet site which saves its information in a database, it will need more space, the more people make use of it. To give an example, if you have a discussion forum, the greater amount of opinions people write, the larger the database will be. Emails, in particular ones having attachments, also require some disk space in the site hosting account. The disk space quota that you will get with any website hosting supplier is the full amount of info you can have at any moment, it consists of website files, e-mails and databases. Similarly, a computer has a hard drive and the computer software installed on it in addition to any documents and music files that you create or download require storage space, which can't surpass the overall capacity of the hard disk drive.