bookmark_borderFixing “Upload folder is not writable” Errors
If you’re getting an error on within Gravity Forms that says that the upload folder is not writable, there are a few different problems that can cause it. Here are some troubleshooting steps that should help you track down the issue and solved the problem.
Check Folder Permissions
Most often, the error is caused by incorrect folder permissions within the wp-content/uploads directory. This is a standard WordPress upload path that will need to be writable before anything is able to be saved to it.
To fix the issue, often times it’s as simple as setting the permissions correctly to 755 or 775. If you’re not sure how to change your file permissions or what your permissions should be, your web host will be able to point you in the right direction.
Check PHP Settings
While somewhat uncommon with modern web hosts, you might have Safe Mode enabled on your PHP configuration. To properly save content from WordPress and Gravity Forms, you’ll need to disable Safe Mode.
If you don’t know how to do this on your own, your best option is contacting your web host.