Apple says that, in order to enjoy ProRes video recording in 4K at 30 frames per second, you
GAME-CHANGER (actually NOT) iPhone 13 Pro Max ProRes Video with Filmic Pro APP
Apple iPhone 13 Pro (128GB, Silver) [Locked] + Carrier Subscription
iPhone 13 Pro's 4K ProRes video mode not available on 128GB models
Refurbished iPhone 13 Pro Max 128GB - Graphite (Unlocked) - Apple
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Apple iPhone 13 Pro Max 128GB Unlocked Smartphone -Excellent - International Society of Hypertension
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Apple iPhone 13 Pro 5G 128GB Sierra Blue (T-Mobile) MLTT3LL/A - Best Buy
One measly minute of 4K ProRes video eats 6GB of an iPhone 13 Pro's storage
Apple still limits ProRes recording on 128GB iPhone 14 Pro and Pro Max
How much storage do you need on an iPhone 13 if you shoot a lot of video? - iSpace
How to Record ProRes Video on iPhone 13 Pro