When a newer version of an existing file needs to be updated on a website use the "replace file" option rather than just uploading the new file and leaving the old file.

Steps to replacing a media file

• Locate the existing file on the Media content page of the website.
  • Use the search filter to locate the existing file if necessary.

• Once you have found the file, click the Edit button.
• Under the Replace file section, select the Choose File button to select the updated file from your computer.
  • Leave the "Overwrite original file" selected. When checked, the original filename is kept and its contents are replaced with the new file.

Caching

When replacing certain media types like images and audio, the changes may not be immediately apparent. This is because browsers display a cached copy, if previously downloaded, for a period of time. People visiting your site for the first time should see the new media immediately. However, to force browsers to download the new image if previously cached, you can uncheck "Overwrite original file" when editing media.