2. Enter the file selection page, and then open the "folder" in the upper right corner, as shown in the figure.
3. After opening the folder, the storage target selection will pop up and select the storage path you need, as shown in the figure.
4. After selecting the storage path, check the file to be imported, and click the option to join the bookshelf below, as shown.
5. Click Join Bookshelf to pop up the import box. After setting the name of the bookshelf on this page, click OK, as shown.
6. Import quantity and file name will appear after import, as shown in the figure.
7. After the import is completed, return to the bookshelf interface.