128Go
I never stock photos on my phone, only on external disc, so I get not much more than 5Go.
i keep only few apps on my phone, the best ones and used.
however, this year I take an iCloud subscription to upload saves and share easylier my photos to my pc.
i have an SE 64Go but only 30Go are used.
but due to the release of cinematic mode, Dolby vision and propres on new iPhones, I hesitate to take 256Go iPhone 13 pro. Annnnnnd it is too expensive to my so I chose the regular 13 with 128Go.