We've already installed openssh-server on your VMs. Therefore, you can copy your files to your VM through SSH using the following command on your own PC:
where port_number should be 13000 + your machine number. e.g. if you have 30a machine, the port should be 13030.
You can exit by crtl+d .
You may be prompted with "Are you sure you want to continue connecting (yes/no/[fingerprint])? yes". Just type "yes" and then input your password to login.
Similarly, you can use scp to transfer files between VM and your local PC.