When you start WinSCP, the program will ask you for your login information. In most cases, you will only need to select the server’s protocol, enter the host name, user name, and password, and then click Login.
Assuming everything is correct, the program will open a directory window similar to Windows File Explorer.
You can drag files to and from this window, other Explorer windows, and your desktop. To access additional operations, right-click any object, and then select the operation from the context menu. You can also right-click a file or a directory, and then drag it to another location.
See more detailed documentation of various tasks you may do with WinSCP.