SFTP 
INFO

SFTP is also known by its original name: SSH File Transfer Protocol. That is the SSH - Secure Shell protocol, a protocol used to move files. SFTP was developed in the 1990s. And it allows to move files securely.
What is SFTP Client? 
SFTP Client is a software that uses the SFTP protocol to securely transfer files to remote computers.
Instructions for using WinSCP 
- Download and install at: https://winscp.net/eng/download.php
- Click the "New Session" button to initiate a new connection  
- Configure as shown, then click the "Advanced..." button  
- On the left select SSH > Authentication, then click the ... button in the red frame and select private PuttyKey, If you don't have a Private PuTTY Key, please see instructions here Then click OK. Then click OK.
- Click "Login" to log in  
- Done, you can upload the file to your server.  
Instructions for using FileZilla 
- Download and install at: https://filezilla-project.org/download.php?type=client 
- From the menu select "File > Site Manager"  
- Click "New Site" to create a new site  
- Configuration as shown below, note: - ② protocol: select SFTP - ⑤ Logon Type: select key file - ⑦ If you don't have a Private PuTTY Key, please see instructions here  Then click Connect. Then click Connect.
- Done, you can upload the file to your server.