It'll also show how much of the 15GB you've used already, and in what way (Google Drive, Gmail or Google Photos). You can poke around, and it should tell you that you currently have the standard 15GB of storage. To sign up, go to Google One's website and make sure you're signed into the Google Account you want to use. Google One can get you rewards from the Google Store. The app isn't a must for using Google One, but depending on what level of storage you purchase and what you plan on using it for, it can enhance the service and make it easier to use. Google One is accessible through your browser or in the Google One app. Google One replaced Google Drive storage plans in 2018 - so now, if you want more space in Google Drive on top of your free 15GB, you have to pay for a Google One plan. Meanwhile, Google Drive is a free storage service where you can keep up to 15GB of files and photos. Google One is a monthly subscription service that gives you expanded online cloud storage, which you can use across Google Drive, Gmail and Google Photos. What is Google One? How is it different from Google Drive?