What happens if block chain size gets bigger than available space?

[Christlove]

I was taking a look here: https://bitcoin.org/en/full-node and saw a minimum requirement of 200 GB of space,
but looking here: https://www.blockchain.com/charts/blocks-size I see that block chain size is getting close to 300 GB

what is the minimum free space required? and what happens with the server if the block chain size gets bigger than the free space we have in the server?