1

Connect the iPhone to the computer with a data cable, open the iTunes software, and click the "iPhone" icon at the top right of iTunes, as shown in the figure.

2

In the summary interface of iPhone, drag down to find "Manually manage music and videos" under the option. After the inspection, click the "Apply" button in the lower right corner, as shown.

three

Next, the software will prompt that the iPhone has been synchronized with other iTunes, but the iPhone can only be synchronized with one iTunes at a time, so it asks us whether to "erase and synchronize" the original database. Click "Erase and Sync" to continue, as shown.

Note: Because my iPhone has been synchronized on other computers, this prompt will appear here.

four

After the application is completed, click the "On this iPhone" option at the top right of the iPhone management page, as shown in the figure.

five

Select music in the left pane of the software, as shown.

six

Next, open the music folder on our computer and select the music you want to synchronize. Drag music to the right pane of iTunes software manually with the mouse, and then click the "Sync" button in the lower right corner of the software, as shown in the figure.

seven

Finally, wait for iTunes to sync music files with iPhone. Video files can be added manually and synchronized to iPhone in the same way.

end

Method two, synchronize the database on iTunes.

After playing iTunes, click the music option at the top, and then click the "Scan Media" button, and the software will automatically scan the music files on your computer.

Next, you will see iTunes add the music files scanned from your computer to your music library, as shown in the figure below.

After adding the music file, click the "iPhone" icon at the top right of iTunes, as shown in the figure.

In the iPhone management interface, click the "Music" option at the top, as shown in the figure.

Then check the "Sync Music" option, and then click the "Apply" button at the lower right, as shown in the figure.

Note: according to your own needs, it can be with the whole database, or according to your own choice of playlists, albums, artists, etc.