Music.
I have a couple hundred GB of DSD, FLAC, WAV files that I listen to with an audio DAC(digital to analog converter) and a set of Shure SE-846.
There are some high-res, lossless files that are over a GB for a single song.
There are other devices I could use besides an iPhone, but then that’s more cost and one more thing to carry.
These larger storage size options are great!
This to me has always been the beauty in a smartphone, once the hardware to do it all is there, why should you need to carry another device?
I still hear a lot of people say “it’s just a phone, why so much storage!?”
Yet, your smartphone is the one device you carry with you almost everywhere everyday, why should it not be able to carry all that you want (within reason) where you go?
Even the iCloud arguments are useless when you are on a road trip or in some rural place with no high speed internet.
I am no audiophile, but I love my music, movie and series and if I am in sitting in some random airport and I don’t want to connect to public WiFi, I am happy that I have all my stuff stored locally on my phone, I throw it into Airplane mode and enjoy what I want.
Love your use case!
I remember using a Nokia N80 back in the Symbian days when I was in high school, rocking a 128mb memory card in it, watching a horror film on its tiny 2.1inch screen while on a road trip and then switching to my Sony PSP with a 1GB memory stick and wishing both device could be combined as the Nokia had what was at the time, a “high density display” (~259 ppi) and I was playing AVI format movies via DivX player, lol.