Media records contain links to files on your computer. If a file is moved, renamed, deleted, or on a disconnected drive, RootsMagic may show a red X because the file cannot be found.
Use Fix broken media links from the Media page's Tools menu to search for moved files. For a single renamed item, select its current file through Filename in the media edit panel.

Before changing links, confirm that the files are available. After repair, open the originals to verify that the correct files were selected. See Working with Media for storage, tags, and backup guidance.