The bean container is attached/connected directly to the grinder. When removing the container, any beans still inside would fall out. The container is therefore only really removed for cleaning. So if I understand the question correctly, "simply" changing the second bean in this way is not really possible spontaneously. Furthermore, different beans also require different grinds, which means you have to keep changing the grinder. The only really sensible way to use two different coffee beans is to use an additional grinder. Of course, you can brew ground coffee in this machine. You can therefore fill the portafilter with ground coffee outside and then even use the integrated tamping system before clamping the portafilter for the actual coffee brewing. In this case, you only have to make the correct dosage on your external grinder yourself. The machine can then no longer help you with the dosing.

In short: No, you cannot change the bean container when it is full. Yes, you can use externally ground coffee.

Correct - unfortunately not possible