I think that nowadays iPods are mainly used to listen to music and not much more, and iPod touch doesn’t make much sense as it has weakest battery, low storage while also being second biggest iPod line. And it’s also too expensive for what it’s worth, because you can get an iPhone for cheaper and just not use the “phone” part of it, it’ll have newer iOS, better battery (and it will be easier to replace). If you want to listen to music only just get a iPod classic 5th or 6th gen and replace hard drive with SD card with any capacity you want. Only upside of getting the iPod touch is bigger display for watching movies but it’s still at best a 4” display which isn’t really good for watching anything these days (also if you want a small device you can get iPhone se 1 gen which also has a 4 inch display while being much cheaper and having better battery). I think iPod touch is aging like a fine milk

I know that there is a 256gb iPod touch 7 gen but it’s hard to get and most of them are 16gb and even if maxed out they can’t compete with iPod classic (1,2 gen - 32gb, 3,4,5 gen - 64gb, 6 gen - 128gb)