This is actually the easiest way to get music to your One X/X+/One/One Mini/One Max, since they all uses MTP which is a part of the media player framework.
This works on ALL Android devices that uses MTP for usb connection.
EDIT: this of course works on the new One M8 as well.
So, how do you do it?
- Start Media Player, make sure you have the music you want to sync in there. Will not cover how you do that, as it’s rather simple.
- Connect your phone, it will after a while show up to the right.
- Simply drag the music to the indicated place, it will show you a list of what will be synced to your phone.
- Click on Sync now, it you will show you progress of it.
- And you’re done!