Music source?

This is going to sound dumb, but I recently bought the Fiio FX1221 without knowing much about it, on a whim I guess, and don't know what to do or where to go to get music. I am used to the iPhone and iTunes, have bought quite a bit but don't think that'll be able to download to the new unit. Can someone point to a download source where I can get some tunes for free? My tastes tend to be old rock and newer country, so I don't need the latest pop or metal. Thanks to anyone that can offer some help.
100% upvoted

close but this may not be spot on for what you are looking for. If by FREE you mean pirate that's not something you should probably be posting on here. If you bought the files on itunes you should be able to play them on the FiiO as it supports AAC. It just won't do the auto-sync stuff that Apples own devices perform.