IPhone – iCloud Photo Library fills entire phone with remaining storage in ‘System’

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Help! For the past year, it seems that enabling the "iCloud Photo Library" feature on my phone causes the entire phone's storage to fill with "System".

I've checked the Storage summary and Photos is currently using 278.2 MB.
Scrolling all the way down shows System as using 15.13 GB.

Nothing helps with clearing this storage other than restoring my phone. The second I enable 'iCloud Photo Library' the entire phone's remaining storage begins to fill-up.

Has anyone had a similar experience? Any ideas on how to fix this?

Best Answer

In Settings > Photos > Turn on Optimize iPhone Storage. This should prevent full resolution photos from being stored on your device and should remove content from local storage when your device fills up.