Sending Out Invites
This is where you can send out invites to Copy. Simply add the persons information along with their email and they will receive the email and be able to download copy through your referral. If they complete all of the steps then you will be able to receive an additional 5GB of storage.
You can also share the URL link at the bottom. By posting this on Twitter, Facebook, Google+, or anywhere, you will have a better chance of getting more people to sign up under you which will also give you an additional 5GB per referral.