One of those cheap 12-15$ AliExpress DVD R/RW USB C drives did the trick for me.

In its current state, it’s mainly a tool for developers to be able to build prototypes or experiments quickly. From a user perspective, there isn’t enough yet. We’ll need more apps before it’s useful for end-users. I want to improve the core functionality before I build more apps: I already have to maintain about 2 dozen apps and I’d rather spend my time on building a better platform for now.