If you plan on doing a good deal of video recording (especially if your preference is 4k), get the 128. Sure, Google is providing unlimited cloud storage, but it can only back it up so quickly, so if you were to keep a 32gb model even 50-75% full, you might find yourself noticeably affected by the difference (plus, with whatever storage size you choose, bear in mind that a fixed chunk is reserved for the OS (a greater % of usable storage when mapped against 32gb vs 128), and that as you approach capacity you'll find general phone performance beginning to deteriorate (or at least that's been my experience)).