Xiaomi's mobile phone runs MIUI system, which will automatically save the downloaded music, video and other media files on the SD card of the mobile phone (if any), without special settings, as long as the SD card of the mobile phone is correctly connected to the mobile phone.

if the phone can't detect the SD card, these media files will be automatically saved to the built-in storage of the phone by the system. This is the default setting of MIUI system.

You can set the downloaded song as the ringtone of Xiaomi's mobile phone:

The steps are as follows:

1. After Xiaomi's mobile phone is connected to the computer through the data cable, find the mobile SD card disk in my computer and put the downloaded song into the Media/Audio/ringtones directory of the SD card;

2. Turn on the phone, touch the "Settings" icon, and then touch "All Settings";

3. Pull down and touch "sound and vibration";

4. Touch "ringtone" and "mine";

5. Here is a list of all ringtones that already exist on the mobile phone, including songs that have just been imported into the SD card. Find and select it;

6. click "ok".

7. At this time, the ringtone is set as the downloaded song.