The External Assets tool is a useful utility for fixing broken links or links to content from other sites.
The External Assets utility in Design Tools is a useful complement to Canvas’s built-in link-checking tool. While the “Link Validate Links in Content” tool can be extremely helpful in scanning your entire site to locate broken links, fixing these broken links can sometimes be challenging.
Design Tools offers significant assistance in this area. For instance, when encountering links within an image that mistakenly point to content in another course, the import and update feature will upload that content into your course and upload the link automatically.