Once you have all of the tracks you'd like to download in your Crates, you can download all of the tracks together as one zip file. It's easy to do in just a few steps.
First, click the Crates icon at the top of the page, then click the Crate you'd like to see. If you don't see the Crate you want to download, click "See more."
On your My Crates page - or the individual Crate's page - just click the download icon. It looks like this: