I have a ton of photos, taken with high megapixel cameras and not just the phone - thus if you want those with you (not even talking about the propagated 4K and up videos from drones, phones and dslrs) it only starts to get interesting at 521GB+ (for the ones you keep).
If there’s ways of offloading video footage (lightroom for photos does work ok as a buffer) for editing-apps i’m more than happy to hear about alternatives other than adding it to your photos library or files.
Photos do not have to all be downloaded to the device. It will manage the storage and mainly keep more recent photos on device. It will download others as needed. That may not be perfect for you but it does help offset the storage situation.
I have an iPad Prod with 256GB of storage and it is currently only using 70GB.
If there’s ways of offloading video footage (lightroom for photos does work ok as a buffer) for editing-apps i’m more than happy to hear about alternatives other than adding it to your photos library or files.