How to transfer files from Windows to Steam Deck

If you still have a Windows system somewhere and you want to transfer files to the Deck, you can easily transfer those files using SSH/SCP.
By default, the Deck has an SSH server installed, but it is not started.
You can easily enable it using a terminal on the Deck and execute:

sudo systemctl enable sshd
sudo systemctl start sshd

Once SSH has been started, you can use, for example, winscp on the Windows workstation to connect to the deck.
You can find the IP address of the Deck by using the command below within that same terminal:

ip addr

Instructions explained in a YouTube video: