Drupal Error “The selected file /tmp/******* could not be uploaded”

Have you ever encountered the following error in Drupal: “The selected file /tmp/filesisAcp could not be uploaded, because the destination is not properly configured.” I got this error after setting up Google Map on the contact us page to display office locations. This is caused by “file” directory permission issue in my Drupal installation directory. To verify the error, go to Administer >; Site Configuration >; File System: Drupal will complain that the directory “sites/default/files” is not writable. Simply log into the web server and chmod the directory from Drupal root directory:

chmod 777 sites/default/files

This should resolve the error we saw before.