Copy a directory from a server (UNIX) to a PC (Windows)

Hello, I already do some question about this topic. I already establish the conection from the server (Centus) whit the windows PC using SSH. Now I have two problems:

1- The server always ask me about a password to copy the files to the windows pc, I don't know how to avoid this, if someone can explain me how can I do to copy a file from my server (Linux) to my pc (Windows)in an automatic way without the necessity of write the password, please help me.

2- In the way it make the copy, the server only make a a file with the name of the file inside the windows pc, but it file don't have nothing inside, I mean the copied file have size = 0. Someone knows what is happening to my copy?

passwordless ssh can be done relatively simply with shared keys, see the link.

I'm less certain what's happening with the empty files, but running scp/sftp with the -b flag may help, it will print verbose debugging information. If you can convince the windows sshd to run with -d for debugging output that may also help explain. I suspect permission issues on the Windows host but that's only a guess.

download the free software "winscp" with GUI interface to make the job easy.