OP, you might reconsider managing your storage. Else you probably need more and more and more and will never have enough. It's expensive to keep adding to the virtual warehouse for digital hoarding. Consider pruning the many vaults. Odds are high that so much of what is currently stored could be dumped (or archived to a hard drive attached to a computer) and you would never miss it.
Manage your cloud usage. Else you probably need more and more and more. Companies renting a hard drive in the sky love digital hoarding: raise that forever rent. But what if there was no cloud? Could you roll with some other option that has no rent? Yes you can. We all easily did it before iCloud.
33GB of Messages storage reads like the never-ending text message accumulations, common on much tech. Work messages like we work phone calls: start one, chat, then end the call (close the text). When you want to chat with that person again, start a new chat. You'll nearly immediately see about 31GB+ freed up from your device. Just about no one needs a forever record of everything that has been said in every text chat. Immediately save anything to be forever preserved (which is usually not piles and piles of cat videos or similar people send each other) and then delete the messages. If every one of them is precious and must be forever maintained, print them as PDF files you can archive on a single hard drive attached to a computer.
13GB for voice memos seems excessive unless you have a special case where you need that much voice stored and available at all times. Offload the ones you don't need at all times and keep only the ones you do need on device. That should free up a considerable amount of storage on device.
Manage synched music, photos, etc via synch with Mac. In other words, store the whole libraries on Mac and synch only that which you really want on the mobile. You can't listen to 9GBs of music in a few days even if you ran it non-stop. You probably don't look at 9GBs of photos (ever). WhatsApp can be managed just like the 33GB Messages thing described above. Make favorite playlists in Music and sync just those. Make favorite photos albums and sync just those. Just about nobody needs to be carrying around their entire library of such media. Especially stuff like that can't be consumed even if you tried by doing nothing but playing music or looking at photos on device. There's just too many.
How I pick storage when buying a new device
Look at my normal amount on device I already have. If it is within 30% of "full" while applying the above, I need the next tier in the next purchase. Else, I have enough.
An exception consideration: do I heavily travel and shoot a lot of 4K video without a handy way to offload the shoot to a Mac or other storage? If I'm shooting extensive video with no easy way to offload it, I probably buy very big storage so that I'm always ready to capture big video.
I run a business but rarely have more than a few text messages active in messages (because I close conversations when a round to texting is done). I have about 8% of my music library on device (all favorites in a number of playlists). I have about 5% of my photos library on device (all favorites in a few synched albums)... and I utilize only the free iCloud space, pruning anything that piles up in there to get it towards the 5GB limit. If I want to mix up music or photos, I can readily replace some synched playlists & albums with other synched playlists & albums.
If I had 330GB of cloud "need", I'd buy something like a Synology NAS to own my own cloud and drop the rent. You don't say what's in all of that but much of it could probably be locally stored on a hard drive. If every bit of it must be accessible at all times, I'd own my own cloud to not pay the forever rent.
Not everyone should adopt my ways and some may have valid reasons for needing much more storage/cloud. But another way to think about it is through the lens of conservation. What if peak available storage was LESS than we use now and there was no iCloud? How would we make that work? We certainly would make it work. How? We would be more selective about what we store on device and all of our cloud media would likely be on a hard drive attached to a computer. It's not that many years when there was no iCloud and on-device storage was much smaller than today. We made that work just fine.
Else, there will never be enough storage in device and in the cloud... and we will always be piling up more and more media in both (much of which we'll never actually access)... and pay-pay-paying for doing so.
