The more recent versions of the popular blogging platform WordPress have been giving errors when trying to upload a file through the WordPress admin. The two most common errors seem to be “Unable to create directory” and “The uploaded file could not be moved to”. To fix these errors try this:

Unable to create directory …

Set the permissions of the wp-content folder to 777. This should allow WordPress to create directories within the wp-content folder.

The uploaded file could not be moved to …

In the WordPress admin under settings > miscellaneous set the default upload folder to wp-content/uploads. Then make sure the uploads folder exists and set the file permissions on the folder to 777. This should allow WordPress to write images to the wp-content/uploads folder. If you still get the error delete the uploads folder and recreate it manually and reset the permissions to 777.