
Once you do, Play Music will only drop the needle on tracks that are already downloaded on your Android or iOS device, perfect for listening on the subway or keeping your mobile data use in check.

Tap the main menu button in the top-left corner of the screen, then toggle on the Downloaded only setting. Google Play Music’s offline mode lets you listen to downloaded tracks when you’re out of range of cellular or Wi-Fi, or simply to cut down on your mobile data use.

Once you’ve saved a few instant mixes to your device, you’ll be ready to tee them up wherever you are, even if you’re offline-and indeed, if you’re intent on burning as little mobile data as possible while listening to your tunes on the go, your best bet is to switch the Play Music app to offline mode. Note: Any music you’ve previously purchased from the Google Play Music store will already be sitting in your online music library, and they won’t count against your free 50,000 song uploads. Once you’re done with all the uploads, though, your tunes will be available for streaming or download in the Play Music app for iOS and Android, and even on Play Music in a web browser-and best of all, Google will let you upload up to 50,000 tracks for free. Google’s Music Manager tool does its best to “scan and match” your tunes with existing tracks in the cloud, but it’ll end up uploading many of your songs, a process that could take hours or even days depending on the speed of your broadband connection and the size of your music collection. Google offers a downloadable ”Music Manager” tool that’ll upload music from your PC or Mac to your Play Music account, or you can simply drag and drop music files into the Upload window of Play Music for Chrome.

You can upload up to 50,000 tracks to Google Play Music for free.
