Questions people actually ask
I deleted photos and nothing changed. Why?
Because they are not gone yet. Deleted photos sit in the Recently Deleted album
for 30 days so you can change your mind, and they occupy storage the whole time.
Open Photos → Albums → Recently Deleted
and delete everything in it to actually reclaim the space.
Does turning on iCloud Photos fix this?
It can help, but it is not the same as freeing space. With iCloud Photos enabled
and Optimize iPhone Storage selected, iOS keeps smaller
versions on the device and the full-resolution originals in iCloud. Two caveats:
you need enough iCloud storage for the whole library, and iOS decides when to
swap originals out — switching it on does not immediately empty the drive.
Can I add a memory card or an external drive?
No card slot exists on any iPhone, and internal storage cannot be expanded. An
external drive connected over USB-C or Lightning is useful for copying files off
the phone, but it does not give Photos or your apps more room to work in.
What happens if I let it fill up completely?
The Camera stops recording, apps fail to save, updates and iCloud backups stop
completing, and apps that cannot write data may crash on launch. iOS will not
delete your files behind your back, but the phone becomes unpleasant to use.
Does offloading an app lose my data?
No. Offloading removes the app's program files and keeps its documents and data;
reinstalling restores everything. Deleting the app removes both, which is why iOS
offers them as separate choices.