Select your desired storage tier and follow the on-screen prompts to confirm the monthly billing. Go to Settings > [Your Name] > iCloud . Scroll down and tap Manage Plan .
To buy more storage for your iPhone, you must upgrade to an subscription , as the physical internal storage of your device is fixed and cannot be changed after purchase. Step-by-Step Instructions to Upgrade
Choose a new storage plan and follow the instructions to buy. iPhone Device Storage vs iCloud Storage
The process varies slightly depending on your version of iOS. Open the Settings app and tap [Your Name] at the top.
