Follow these steps to modify the FTP User quota.
1. Log into your cPanel control panel.
2. In the "Files" section, click on "FTP Accounts" Icon.
3. Under the "FTP Accounts" list, click on "Change Quota". 
4. Click on the "Change Quota" button.
1. Log into your cPanel control panel.
2. In the "Files" section, click on "FTP Accounts" Icon.
3. Under the "FTP Accounts" list, click on "Change Quota".
4. Click on the "Change Quota" button.
