You can find gigabytes upon gigabytes of free online storage from a variety of sites and services. Only one, though, is offering a massive 200GB of cloud storage at no charge.

Symform announced that customers can get up to 200GB of free storage, but there’s a catch…or two. Users start with 100GB, and can earn the additional 100GB–10GB at a time–through a referral program. Setting up a Symform account also requires you to contribute unused space from your local storage.