What protocol are you using? Did you try another client using the same protocol?

I am trying to use WinSCP to sync the files from a directory located on a linux-based supercomputer back to my Windows computer. I am able to connect successfully and start the syncing process; however, the download speed is incredibly slow. The directory I would like to sync contains subdirectories and several GB worth of data, and the download speed is only around 400 KB/s leading to an estimated time of over 15 hours. I have tried searching for a solution online, such as disabling the 'Optimize connection buffer size' option, but it did not increase the download speed. In connecting to the supercomputer, I am tunneling through another server. If I connected to VPN instead using the tunnel to connect to the supercomputer, would this increase the download speeds? Are there any other settings that I can try to change within WinSCP to increase the speed?

I will be generating nearly 1 TB of data over the next year so I need to solve this as soon as possible as the current download speed is unsustainable. I appreciate any help!

Ideally I would like to be able to transfer the data directly to a mapped network drive located on my computer. However, when I tried this, the download speed decreased even more drastically to only 35 KB/s. Any ideas would be very helpful.