bmrp

You can just search for paper trading. Interactive brokers has one, and so does Trading212.

I did not know they had to maintain data that way, but I guess it makes sense.

That is good to know! Thanks for the explanation! Now I know to never use an SSD as backup o.O

Thumb stick, SSD, non-volatile memory in general - needs a plug-in once in a while.

What do you mean by this? It is non-volatile after all.