iPhone 15 Pro 128GB variant can record 4K ProRes directly to external storage

ProRes video recording is supported in up to 4K quality at 60fps for both internal and external storage. 

iPhone 15 Plus vs iPhone 13 Pro Max: Which Apple phone should you buy?

iPhone 15 Pro Max review: scope the difference - PhoneArena

iPhone 15 Pro: Price, availability, specs, and everything you need to know

iPhone 15 Pro: Price, availability, specs, and everything you need to know

Titanium Design: Apple iPhone 14 Pro vs Apple iPhone 15 Pro: Titanium build, A17 Pro chip Action Button and all that's new - Times of India

Apple unveils iPhone 15 Pro and iPhone 15 Pro Max - Apple

ProRes in 4K limited to iPhone 13 models with 256GB of storage or more - iPhone Discussions on AppleInsider Forums

iPhone 15 Pro Max review: scope the difference - PhoneArena

iPhone 15 Pro – How to record ProRes 4K 60 to external SSD

iPhone 15 Pro - How To Record to EXTERNAL STORAGE (plus file transfer tutorial)

Apple reveals iPhone 15 Pro and Pro Max with USB-C and Action button

About Apple ProRes on iPhone - Apple Support (English)

iPhone 15-Ready: Choosing the Perfect Portable SSD - Chargerlab

Apple iPhone 15 Pro: New Leaks Suggest Surprise Big Upgrade Coming

Apple's iPhone 15 Pro 128 GB variant can record 4K ProRes directly to external storage - Game News 24