Every file you add to an article in your knowledge base is stored in your Files page.
If you've added the wrong file to an article, you can either delete the file or select it and select the Replace control (two arrows pointing side-to-side) to replace the image or file with a new one.
If the file itself needs to be updated with a more recent copy--such as an updated screenshot or more recent version of a Word document or PDF--consider editing it directly in the Files page, which will automatically update any articles where that file is used. You can edit the file's name, the file itself, or labels associated with it. Refer to Edit and update files for instructions on making these types of file edits.
You can't edit the URL of a file.
