WinSCP
From OCF Help
WinSCP is a freely available Secure File Transfer client downloadable here.
Using WinSCP
Note the two windows split vertically. The left window contains the files on your local computer, and the right window contains the files on your account on OCF.
For various functions, such as navigating through the folders and downloading/uploading files, the simplest method is to right-click on the screen. For example, to navigate through the folders, right-click on any black space on the window and choose "Go To...". Use Parent Directory to move to the parent folder, Home Directory to return to your home folder (where you start when you first log in) and Refresh, if the changes to the folder does not appear immediately.
For operations with files, either right-click on a single file, or make a selection (by click-and-drag, same as in Windows Explorer) and right-click anywhere within the selection.
Detailed Instructions
Connect to the OCF. Start the application and you will be prompted with a Login dialog.

Input the settings obtained from our SSH documentation. You can put in your password here or wait until after you verified the host key.

If this is the first time you have connected to ocf using this client, you will be prompted to check the identity of the remote host. At this point, there is no way for the SSH client to determine if the host you are connecting to is actually the host it claims to be. It will provide you with a key fingerprint and asks you if you want to continue. Most people will just click Yes and assume it to be the correct host. The OCF publishes the SSH host keys of all of its systems, so you really should check. It doesn't take that long and you only have to do it once. In this case, the host key page gives the following entry for ocf.berkeley.edu:
- SSH 2 RSA fingerprint: 56:8e:7c:29:f9:c9:94:8f:39:76:37:2f:c6:37:bf:e2
- NOTE: this is the key at the time of this writing. Please check against the SSH host keys page, as the keys may change.

Enter your password when when prompted (if you didn't enter it before).

You are now logged-in and may transfer files.

By default, WinSCP will display hidden files and directories. Since most linux/unix applications store settings in hidden folders in your home directory, this can easily overwhelm your screen (see above). You can disable this behavior by going to Options-->Preferences and deselecting the Show hidden files option.

The result is a much more manageable file list.

