This article will guide you on how to resolve 'Upload: Failed to Write File to Disk' Error in WordPress.
The Upload: Failed to Write File to #Disk WordPress error can occur due to a number of reasons.
The most typical cause of the error is incorrect folder permissions.
But besides incorrect permissions, this error can also ocurr due to your website exceeding the quota limit of the hosting service.
To fix this #WordPress #error:
1. Try changing the permissions on the wp-content directory to 766.
2. If you still have problems, try 767, 775 or 777.
3. Once your uploads are working, change the permissions on wp-content back to 755 again and check that everything still works OK.