Transferring files to and from the Mill can be done via the terminal using the scp command. Terminal commands are covered in more detail in the full Mill documentation here. More user-friendly are SCP clients: programs with graphical interfaces that give a traditional file browser interface and execute the required scp commands in the background. For Windows users, we recommend WinSCP. For Linux users, the native file browser can mount remote locations.
WinSCP
To connect to the Mill, fill in the username, hostname and password fields. Add port 22 if not already filled in and hit login. You may elect to save the login details to make this faster, but it is not recommended to save your password for security reasons.

After you have logged in, you will see a pair of file browser windows. The left window represents the file structure on your computer and the right window represents the file structure on the Mill. Files can be uploaded/downloaded by dragging them from one side to the other. Note that this will only copy the files, the originals will remain.

Linux File Browser
The Linux file browser can open a directory on the Mill. This example is from Debian 12 using Thunar; it may look slightly different on other Linux distributions.
Type the following into your browser bar sftp://<name>@mill.mst.edu/home/<name>/ where <name> is replaced with your username on the Mill.

Authenticate with your password.

After you authenticate with your password, you will be able to see the contents of your Mill home directory in your file browser. You can upload/download files by moving them between your Mill home directory and a folder located on your local machine.
You may also set a bookmark to this location so that you can return with a single click in future sessions.