There are a number of clients and methods for transferring files to and from your VMs.
CyberDuck (https://cyberduck.io/) is a well-known client to move files to and from individual VMs. There are instructions here on using it for scp/sftp:
You'll need to either have an SSH key saved on Jetstream or have the password set on your VM.
WinSCP is another option:
These clients, while suggested, are not endorsed by Jetstream in any way. We have limited means to help with support issues related to these clients.