The Galaxy S20 Plus and Galaxy S20 Ultra feature 128GB and 512GB options. The Galaxy S20 comes with 128GB of storage by default. Though, you’ll have to be a serious power user to need that much more storage space as all the phones feature a healthy amount of internal storage. This means you’ll be able to add up 1TB to whichever configuration of the Galaxy S20, Galaxy S20 Plus and Galaxy S20 Ultra you choose.