There is a "File" in the upper right corner

Click on it, and there are "Add File" and "Add Folder"

Both of which can be used

You can use it to add music by clicking on one

Then they will appear in "Music"

(You can right-click and select "Introduction" to change the artist, file name, COVER, etc.)

After editing, just drag it directly into the place where your nano is displayed on the left

That's it That’s it