The CSV mapping file serves as a helpful tool for maintaining a record of the files and attachments that you have downloaded. It includes several key details such as the File/Attachment ID, File Name, ContentDocumentLinkId, Parent Record Name, Parent Record ID, and the file path.

By referencing this mapping file, you can easily keep track of the specific files and attachments you have downloaded, along with their corresponding metadata. This information helps you organize and locate the downloaded files efficiently.