1. Download the purchased Super Grid course to your mobile phone.

2. Long press the file pop-up menu and click the Rename File option.

3. In the pop-up dialog box, change the file suffix to zip format, and click Save.

4. After finding the file whose suffix has changed in this page, press and hold the file and click the send option.

5. In the pop-up options, click the Save to Network Disk option.

6. Click and select the save location on this page, and then save the purchased super course to Baidu's network disk. Baidu network disk is a national product, which has provided stable and secure personal cloud storage services for more than 700 million users for 9 consecutive years, and realized the coverage and interconnection of various terminal scenes such as computers, mobile phones and televisions.