How to sync this album I just downloaded from my computer to my iphone?

So I just downloaded this album on my computer. It goes to my computer library. I connected my iPhone to my computer then it opens up my iPhone's music library. I tried dragging the album into a playlist on my iPhone's library but that didn't work. So I'm really annoyed and confused.

It should work. Otherwise, the music you download may not be the format iTunes supports. You can check their formats. Usually MP3 should be fine.

Or you can try to sync music with other free iPhone transfer, like Syncios, to have a try.

If both of Syncios and iTunes can't sync them to your iPhone, then you can use Syncios to convert the audio files to the right format. Syncios supports doing that! Http://www.syncios.com/