1. Step 1: Open the screen of the mobile phone and click to open the "File Management" option on the home page of the mobile phone, as shown in the figure below, and go to the following steps.
2. Step 2: After the above operations, find the navigation autonavidata50 folder, as shown in the figure below, and go to the following steps.
3. Step 3: After performing the above operations, press and hold the folder, and then select the "Copy" option in the menu bar page that appears, as shown in the figure below, and go to the following steps.
4. Step 4: After the above operations, go to the folder of the SD card, click the "Paste" button in the lower left corner, and then wait for the paste to be completed, as shown below. In this way, the problem is solved.