How do I get more space on laptop?

I installed Windows on my Mac and of course the two systems share the storage space.

I wanted to ask if there's a way to get more storage space because I mainly want to play with Windows, so I need a lot of storage space.

You could just use an external hard drive or just use a larger hard drive.🤔 hä xD

There are multiple possibilities

External breakfast plate
You are a Mac professional and can change the hard drive with all the welding and gluing
You take the PC to a Mac professional (costs the most)