Failed to Write File Error in WordPress: How to Fix It Easily

By Anila Anwar Jun 18, 2025 9

It's smooth to look at WordPress' "Upload failed to Write File to Disk" attention. Usually, this mistake shows up while you want to upload pictures or documents to your website. Worry not, though. It's a frequent problem that is simple to resolve if one follows the correct procedures.

1. Verify file permissions

Here is how to remedy it:

Utilize an FTP program like FileZilla.
Link to the server of your site.
Visit the wp-content/uploads/ directory.
Right-click the folder and choose File Permissions.
Assign the numeric value of 755 and use it across every subfolder and file.
Click OK to preserve modifications.
Try once more uploading your file.

2. Clear Temporary Files

Your hosting account occasionally runs out of temporary storage.

This is resolved by:

Approach your hosting discipline panel (such as cPanel).
Access the tmp folder or Temporary Files.
Remove dated or unused temporary files.
This could correct the error and free up space.

3. Review your hosting plan's disk quota

Here is what you could do:

Log in to your hosting account.
Head for the Storage Usage or Disk Space area.
Reach your limit, either delete useless files or upgrade your plan.

4. Turn off plugins temporarily

A plugin can occasionally conflict with the upload process in a few cases.
Turn off every plugin.
Try submitting a file once more.
Should it work, create your plugins step by step to locate the one causing the problem.

In many cases, this issue appears together with How to Fix WordPress: 502 Bad Gateway Error? — We’ve written a full guide on that too.