It's not the secure enclave thing. These aren't SSDs. These are raw storage modules. The SSD controller is built into the M1/T2. You are upgrading the raw stora

It's not the secure enclave thing. These aren't SSDs. These are raw storage modules. The SSD controller is built into the M1/T2. You are upgrading the raw storage behind a single, global SSD. Of course when you change the layout of the raw storage, the data arrangement changes and you have to reformat. It'd be like swapping out chips on a regular SSD and expecting your data to still be there.