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

Apple iPhone 15 Pro Max review - More camera power and titanium for Apple's biggest smartphone - Reviews

Record Externally with iPhone 15 Pro to SD Card, Flash Drive, or SSD (USB-C ProRes 4K)

5 Best USB 3 Flash Drives for the iPhone 15 Series - Guiding Tech

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

Apple iPhone 15 Pro Review: It Finally Feels Like a Pro Device

iPhone 15 Pro Review: Genuinely Pro Feel! - AppleGadgets Blog

Record ProRes Video to External Storage on iPhone 15/15 Pro

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

Should I buy the 128GB or 256GB iPhone 15 Pro? - Quora

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

iPhone 15 Pro Supports Recording ProRes Video Directly to External Storage - MacRumors