just do it yourself, it’s super easy, only takes a cheap adapter you can get on ebay or from iflash and like 15 minutes of time, i used this guide to put a spare 32gb in a mini i bought and it was reaaaaally easy https://www.youtube.com/watch?v=1GY761U4vik
eBay. Lots of people putting high stage flash drives in old iPod models. 128gb and up
just do it yourself, it’s super easy, only takes a cheap adapter you can get on ebay or from iflash and like 15 minutes of time, i used this guide to put a spare 32gb in a mini i bought and it was reaaaaally easy https://www.youtube.com/watch?v=1GY761U4vik