What is disk quota?
A disk quota is a limit, set by a server administrator, which prevents applications on your server to occupy more disk space than you allow them to. The function of using disk quotas is to allocate limited disk space in a reasonable way, so you know that your project is not using more space than it should.
How to enable disk quota?
Navigate to the VPS dashboard, choose the server to which you want to apply changes to:
Open the Settings page:
And click on a toggle near Enable Disk Quota:
To configure exact values, open a control panel that supports this feature (such as cPanel or Plesk) and specify your desired values. This feature is really useful if you have quite a few users, and you want to limit their account storage space.