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If you’re running iOS 12 or later, the process for deleting all your photos is pretty straightforward. Just follow these steps:
Open the Settings app.
Tap General >iPhone Storage (or iPad Storage).
Under Store in iCloud, tap Manage Storage.
Tap Photos (or Camera Roll).
Tap Select > Tap All >Tap Delete All.
If you’re running iOS 11 or earlier, the process is a bit more complicated because there isn’t a built-in way to delete all your photos at once. Instead, you’ll need to select and delete each photo individually, which can take quite a while if you have a lot of pictures on your device. To select and delete multiple photos at once, just follow these steps:
Open the Photos app on your iPhone or iPad.
Tap Albums >Camera Roll (or Recently Deleted).
Tap Select in the top-right corner of the screen.
Tap each photo that you want to delete, then tap Delete in the bottom-left corner when you’re done.
Deleting all the photos off your iPhone or iPad is pretty easy, whether you’re running iOS 12 or earlier. Just follow the steps in this article and you’ll have everything wiped clean in no time!