There's only one external storage. And in an attempt (irony alert!) to make permissions "easy" for users to understand, some Android people decided to call the

There's only one external storage. And in an attempt (irony alert!) to make permissions "easy" for users to understand, some Android people decided to call the permission that grants access to external storage "Photos". Because that's where the photos are stored, and it's sometimes/often the most important/sensitive thing there.