Disk quota refers to the maximum amount of storage space allocated to your account on a web hosting server. This includes all files: website code, images, videos, databases, emails, and backups. Think of it as the digital "land" your website lives on.

How much quota you need depends entirely on your website's type and size:

• Small blog/business site: 500 MB - 2 GB is often sufficient.
• E-commerce store: 5 GB - 20 GB, as product images and databases grow.
• Media-heavy site (video/photo gallery): 20 GB+, potentially much more.

Exceeding your quota can cause serious problems: your site may stop loading, you won't receive emails, and you cannot upload new files. Most hosts provide tools in your control panel to monitor usage.

When choosing, consider future growth. It's usually wise to start with a plan offering 25-50% more space than you currently need. Upgrading later is almost always an option. Remember, efficient file management (compressing images, cleaning old backups) is as important as the quota size itself.