Plug the USB stick into the laptop by hand and then, I always choose an action for removable media. What do I have to do?

See above, I'm pretty much still learning, wanted step-by-step instructions for Windows 10 laptop greeting l.k.

Since a lot of information is missing, could you have a screenshot of the message? Don't fully understand the question.

You choose which action you want to carry out: import images, run files automatically, create a backup or just: no action and then you can do whatever you want with it

Select "Open folder" in the window that pops up. Then you can see everything that is on the stick.

Select an action. Or click away the message.

The USB stick should appear as a drive.

When I plug in the USB, I get the message; select an action for removable media and I have no idea what to do

It depends what you want to do.

There are show pictures or show folders, but I would recommend you just go to show folder. Or you can simply remove the window when the USB is empty and then open it using Explorer (not Internet Explorer.)

Well, either you choose something from these actions or you just click away from the message.