How to Fix cPanel Disk Space Usage Issues (Updated 2025 Guide)

Disk space problems are one of the most common hosting issues on cPanel servers. When your account reaches its disk quota, your website can become slow, fail to send emails, or even stop working entirely.

This guide shows you exactly how to diagnose and fix disk usage issues in cPanel, step-by-step.

What Causes Disk Space Problems in cPanel?

• Email accounts storing thousands of old emails
• Large error logs or backup files
• Old website backups
• Cache files from WordPress (Elementor, LiteSpeed, WP-Rocket, etc.)
• Softaculous/Installatron backups
• Temporary session files
• Large WordPress uploads folder

1. Check Your Disk Usage via cPanel

1. Log into cPanel
2. Go to Disk Usage
3. Scroll down to the folder size breakdown

Look for large folders such as:

• public_html/wp-content/uploads
• public_html/error_log
• .trash
• mail/
• tmp/

2. Clear Old Email Storage

Check email usage

1. Open Email Accounts
2. Click Manage next to a mailbox
3. Scroll to Storage
4. Open Webmail → Roundcube → Settings → Folders and empty Spam/Trash

Enable auto-delete for old emails

Inside Roundcube:

• Go to Settings → Filters
• Create a rule to delete emails older than X days

3. Delete Error Logs & Cache Files

Common large files:

• error_log
• debug.log
• wp-content/cache/
• logs/

It is safe to delete log and cache files.

4. Remove Old Backups

Softaculous and Installatron backups often use several GB.

1. Go to Softaculous
2. Open Backups
3. Delete old backups

Also check:

/home/username/softaculous_backups/
home/username/backups/

5. Clear Temporary Files

Temp files build up in:

• /tmp
• /home/username/tmp/

If your host allows SSH, you can run:

rm -rf /home/USERNAME/tmp/*

6. Identify Large Files in File Manager

In File Manager:

• Sort by Size
• Check for large files
• Delete or download before removing

7. Remove Unused Websites or Staging Copies

Old development sites often take up several gigabytes. Delete:

• Old test sites
• Staging folders
• Unused WordPress installations

8. Enable Disk Usage Notifications

In cPanel:

• Go to Contact Information
• Enable “Disk quota is almost full” notifications

9. Ask Your Hosting Provider for Help

If usage still seems incorrect, your host can check for:

• Hidden backup folders
• Large server-level logs
• Inode limits
• LVE container issues

Conclusion

Disk space issues in cPanel are common but usually easy to fix. By clearing logs, cache, old backups, and email storage, you can often free 1–10 GB instantly.