https://wccftech.com/2020-27-inch-imac-non-upgradeable-ssd-modules/

Apple’s MacBook line has been the subject of controversy by not allowing users to freely upgrade the storage. Unfortunately, it looks like Apple is sticking to the same approach with its 2020 27-inch iMac as this model doesn’t provide upgradeable storage for users either.

A German website by the name iFun refers to the internally published info, claiming that the 2020 27-inch iMac has SSD modules that are soldered directly to the motherboard. This means that swapping them out and replacing them is next to impossible. Thankfully the 2020 iMac does allow users to upgrade their existing RAM very easily so it’s not like Apple took everything from customers.