It is possible to expand the internal memory up to 2 TB using a memory card on this phone. So you can increase storage capacity from 128GB to 256GB or more by adding a compatible memory card.

The accessories are currently available directly from the manufacturer. https://nothing.tech/collections/accessories

Unfortunately, we cannot yet say exactly when and if the accessories will be available, I am very sorry.

You really sell mobile phones that you don't even know the SAR of?

We can't say for sure at the moment.