Backing up my storage to more space
How to get more space of my iPhone storage
iPhone 6s Plus, iOS 12
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You are not going to be able increase the physical storage space of your iPhone. That total space will remain the same since the day you bought the iPhone. The only way you can free up storage space is by deleting some apps, photos, music and videos. Medial files take up the most space.
Axel F.