On MacOS use the terminal app, or XQuartz for an xwindows session.
Terminal.app it built into the os.
Xquartz: https://www.xquartz.org
On Windows you can use putty, or my preference MobaXterm.
Putty: https://www.putty.org
MobaXterm: https://mobaxterm.mobatek.net/download.html
On MacOS scp, from the terminal window , or for more volumes FileZilla
FileZilla: https://filezilla-project.org
On Windows:
MobaXterm Does have a graphic sftp interface. (See above)
Putty also has a graphic sftp interface. (See above)
My preference is FileZilla. It is a graphic interface for a lot of file transfer protocols..
FileZilla: https://filezilla-project.org
Currently you need to tunnel it over ssh. Here are the instructions
In a terminal where you have access to SSH, do:
sudo ssh blue.cs.sonoma.edu -l yourBlueUsername -L 22:127.0.0.1:548
You will be prompted first for you MacOS user's password.
and then you will be prompted for you Blue user's password
Then, you can use the following destination as the endpoint to mount the share via AFP:
afp://localhost:22
The popup window will be for you blue username and password.
Make sure the option is Unchecked for remembering your password in my keychain.
To disconnect, unmount the share that you mounted and then type exit in the terminal
where you created the ssh tunnel.