cant format internal disk alpha

I bought an SSD for my Lattepanda Alpha device, and after a lot of effort, I managed to install Windows 10 on the SSD and run the system on it. But now I cannot format the 64GB storage disk built into my device. I could not do the installation using USB, nor could I do it with the clean command in diskpart. It gives an error, it looks like it did, but it doesn't. Can you help me on this?