Optimize Phone Storage: Underlying logic?

I’ve trawled the web for info on iCloud Photo Library’s “Optimize Phone Storage” option on iOS, but can’t figure out the exact logic applied.

From Apple:

iCloud Photo Library will automatically manage the size of your library on your device, so you can make the most of your device’s storage and access more photos than ever

I assume the device will cache high-res photos up to a point, but what is this point in terms of MB remaining on the device?

In addition, does iCloud Photo Library perform any housekeeping on that cache, e.g. clearing out high-res copies you’ve not viewed in n days – if so what is n?


Source : Link , Question Author : Phil Jenkins , Answer Author : Community

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