My Skyrim mods download folder alone is over ½ a TB.

I also want to load a 1TB MicroSD on my Steam Deck for emulation, so I need at least another 1TB to download the image file to flash to the MicroSD card. (I don't want to fuff around downloading and curating a romset, so it's easier to just download a 1TB image from a private tracker and flash it. From there, I can just swap individual roms/romhacks in and out as needed.)

My Deck will have a 1TB SSD and a 1TB MicroSD. My desktop had 2TB, but I just added another 4TB.

On the other hand, on my phone I barely use half of my 128GB and will likely never run out of space.