: Go to Settings > [Your Name] > iCloud > Manage Storage > Buy More Storage . 2. External Accessories (Physical Storage)

after purchase, you can effectively "buy" extra space through iCloud+ subscriptions or by using external hardware . 1. iCloud+ (Cloud Storage)

If you want to avoid monthly fees, you can use external drives that plug directly into your iPhone's port (Lightning or USB-C). How To Buy Storage On iPhone?

: Use the "Optimize iPhone Storage" setting ( Settings > Photos > Optimize iPhone Storage ) to store full-resolution photos in iCloud while keeping smaller versions on your phone.

This is the most common way to get more space for photos, videos, and backups. It syncs across all your Apple devices but requires a monthly subscription.

While you cannot technically upgrade the physical internal storage of an