Me. I am basically trying to squeeze the desktop ^(PC)^ out of my phone, so there's a lot of "unnecessary" stuff.

For example, I am currently deciding whether to keep the 110GB of DVD ISO files which I can stream from my phone using VLC (on client side) which are served by nginx server from my phone (this way I still get all menus, just like with a physical DVD) or delete it and replace it with equally sized 110GB EN Wikipedia maxi .zim package, install kiwix-tools on Termux and set up nginx on Termux to serve as revese proxy to kiwix-serve so I could also host a mirror of the whole English Wikipedia, including (downscaled) images on my phone. I guess that sounds cooler than DVDs.
Or I should get a 512GB SD card and keep both.
I can't afford 1TB one.

But yeah, that's just one example. My 256GB SD card is about to pop while my video and music collection (The latter of which which is also served using Navidrome server in Termux 🙂. For videos I just use nginx with material fancyindex theme.) keeps growing.
I already have to keep some stuff on phone's internal storage.

Termux is godsent. Otherwise I'd absolutely have to get a PinePhone as I couldn't live with something as locked down as Android or even iOS without a nice terminal emulator.
Alternatively, I could benefit from pocket-sized passively cooled laptop.

I have 128gb SD on my phone and it's alway full.

Partly a mismanagement issue, but my music library at home is more than 120gb. I'd rather just carry my full library - why not? Storage is cheap.

Then there's video. I prefer pulling video on wifi, rather than stream and burn data. Again, why not? Storage is WAY cheaper than cell data. And I'm being a good neighbor by leaving bandwidth available for other uses.

Phones don't have (full size) SD card slots, this is for cameras and such.

Well I mean, 640KB of memory ought to be enough for anybody.

I won't mind that much storage, the 256GB I have are nearly full.