If you also need to erase your Apple Watch, you can use these steps to unpair your devices.
To download more apps and media, or help your phone run better, you can clear space on your phone. Storage is where you keep data, like music and photos. Memory is where you run programs, like apps and the Android system. Clear cache from third-party apps. App cache is similar to browser cache. It's small bits of information stored to speed up your experience using an app.
Tap Settings > General > Reset
If asked, enter your passcode or Apple ID password
Then confirm that you want to erase your device. Forgot your passcode or Apple ID?
Wait for your device to erase
Depending on your device, it can take a few minutes to completely erase your data.
If you can't erase your device
How To Clear My Phone Memory
- If you don't remember your passcode for your iPhone, iPad, or iPod touch, or your device is disabled, learn what to do.
- If you forget your Screen Time passcode, you need to erase your device, then set it up as a new device to remove the Screen Time passcode. Restoring your device using a backup won't remove the Screen Time passcode.
Free Up Memory Windows 10
If you still need help, contact Apple Support.