Where will my mobile devices download my offline playlist in my pc from?

[PantheraLeo]

Hello there,

I searched this out but didn't find any exact and clear answer. I'd like to listen to my musics having been downloaded in my pc offline on my mobile devices as well, but unfortunately I'm limited to 150 GB bandwidth per month and don't want to waste it with "double download". Should I toggle the "available offline" switch on, or forget listening to music when my phone in my hand?