1. First open the file management software, switch to the "Browse" page, and click "Document".

2. Secondly, select and open the document imported into kindle software, click the "Share" button below, and select "Save as File".

3. Finally, click "Send to kindle" in the pop-up window, and click the "Send" button, and the file will be stored in the Kindle library. Open the Kindle software, switch to the "Library" page, and view the imported local documents.