Google has just announced a nice bump of cloud storage for your personal tracks. Instead of being capable of keeping 20 000 songs now you can store and stream up to 50 000, more than double.
This increase is immediately available for existing users and new users will also get it, no fees, opt-ins and no worrying about this being a limited promotion, this is a permanent free upgrade.
Bear in mind that Google Play Music’s cloud storage is usable without an All Access subscription, so feel free to upload your tracks.
There are more instructions on how to upload music using Music Manager in case you are in doubt.