How to Use FileZilla to Transfer Files Securely on Windows PC

Whether you’re managing a website, updating application files, or uploading backups, you need a secure way to transfer files between your Windows PC and a remote server. While many servers still support the traditional File Transfer Protocol (FTP), it isn’t recommended because usernames, passwords, and transferred files can be sent without encryption.

In 2026, most hosting providers now recommend SFTP (SSH File Transfer Protocol) or FTPS (FTP over TLS/SSL). Both encrypt the connection between your computer and the server and help protect sensitive data from unauthorized access during file transfers.

In this guide, you’ll learn how to use FileZilla to transfer files securely on Windows, configure SFTP and FTPS connections, upload and download files, and troubleshoot common connection problems.

FTP vs. FTPS vs. SFTP: What’s the Difference?

Before configuring FileZilla, let’s first understand the differences between the three file transfer protocols. While all of them let you upload and download files, they don’t offer the same level of security.

For most users, SFTP is the best choice because it encrypts both your login credentials and file transfers over a single SSH connection. FTPS is also secure and widely supported, but it uses additional ports and can be more difficult to configure on some networks.

If your hosting provider supports both protocols, choose SFTP unless you’re specifically instructed to use FTPS.

What You’ll Need Before Connecting

Before setting up FileZilla, make sure you have the connection details provided by your web hosting provider, server administrator, or VPS provider.

You’ll typically need:

• Host name: Your server address, such as ftp.example.com, sftp.example.com, or your server’s IP address.
• Username: Your FTP or SFTP account username.
• Password: The password associated with your account, or an SSH private key if you’re using key-based authentication.
• Port number: Usually 22 for SFTP, 21 for FTPS, or a custom port provided by your host.
• Protocol: Confirm whether your server supports SFTP or FTPS before creating the connection.

If you’re not sure about any of these details, check your hosting control panel or contact your hosting provider. Using the correct protocol, port, and login credentials will help you connect successfully on the first attempt.

Method 1: Connect to a Server Using SFTP (Recommended)

If your hosting provider or server supports SFTP, it’s the recommended way to transfer files because it encrypts both your login credentials and file transfers.

Step 1: Download and Install FileZilla

If you haven’t already installed FileZilla, download the FileZilla Client from the official website and complete the installation using the default settings.

Step 2: Configure an SFTP Connection

1. Open FileZilla.
2. Click File > Site Manager.
3. Click New Site and enter a name to identify the connection.
4. Under the General tab, enter the following information:
   • Protocol: SFTP – SSH File Transfer Protocol
   • Host: Your server’s hostname or IP address
   • Port: Usually 22 (unless your hosting provider specifies a different port)
   • Logon Type: Normal (or Key file if you’re using SSH key authentication)
   • User: Your SFTP username
   • Password: Your SFTP password
5. Click Connect.

The first time you connect, FileZilla will display the server’s SSH host key. Verify that it matches the fingerprint provided by your hosting provider or server administrator, then accept it to establish the connection.

Once connected, your local files appear in the left pane, while the files stored on your server appear in the right pane.

Upload and Download Files Using FileZilla

After connecting to your server, FileZilla displays a dual-pane interface that makes file transfers simple.

• The left pane shows files and folders stored on your Windows PC.
• The right pane displays files and folders on the remote server.

Upload Files to the Server

1. Browse to the folder containing the files on your computer.
2. Open the destination folder on the server.
3. Drag and drop the files or folders from the left pane to the right pane.
4. Wait for the transfer to finish. Completed transfers appear in the Successful transfers tab at the bottom of the window.

Download Files from the Server

Downloading files works the same way in reverse.

1. Navigate to the file or folder you want to download on the server.
2. Open the destination folder on your computer.
3. Drag the file from the right pane to the left pane.
4. Wait until the transfer is complete before opening the downloaded file.

If a file with the same name already exists, FileZilla will ask whether you want to overwrite, rename, or skip the file. Choose the option that best fits your situation to avoid accidentally replacing important data.

Method 2: Connect to a Server Using FTPS

If your hosting provider doesn’t support SFTP, you can use FTPS (FTP over TLS/SSL) instead. Like SFTP, FTPS encrypts your login credentials and file transfers, making it much more secure than standard FTP.

To create an FTPS connection in FileZilla:

1. Open FileZilla and click File > Site Manager.
2. Click New Site and enter a name for the connection.
3. Under the General tab, enter the following details:
   • Protocol: FTP – File Transfer Protocol
   • Encryption: Require explicit FTP over TLS
   • Host: Your FTP server address
   • Port: Usually 21, unless your hosting provider specifies a different port.
   • Logon Type: Normal
   • User: Your FTP username
   • Password: Your FTP password
4. Click Connect.

The first time you connect, FileZilla will display the server’s TLS certificate. Verify that the certificate belongs to your hosting provider before accepting it. Once connected, you can upload and download files using the same drag-and-drop method described earlier.

Tip: If your hosting provider supports both SFTP and FTPS, choose SFTP whenever possible. It uses a single encrypted SSH connection, making it simpler to configure and less likely to be blocked by firewalls.

Common FileZilla Connection Problems and How to Fix Them

If FileZilla can’t connect to your server, the problem is usually related to incorrect connection details, firewall settings, or an unsupported protocol. Here are some common issues and their solutions.

“Could Not Connect to Server”

This error usually means FileZilla couldn’t establish a connection.

Try these solutions:

• Verify that the hostname, username, password, and port number are correct.
• Confirm you’re using the correct protocol (SFTP or FTPS) provided by your hosting company.
• Check whether the server is online and accessible.
• Make sure Windows Firewall or your antivirus software isn’t blocking FileZilla.

Authentication Failed

If FileZilla reports an authentication error, your login credentials were rejected by the server.

Try these solutions:

• Double-check your username and password.
• Make sure you’re using the correct SFTP or FTP account.
• If you’re using SSH key authentication, verify that you’ve selected the correct private key file.
• Contact your hosting provider if you recently changed your password.

Connection Timed Out

A timeout usually indicates that FileZilla couldn’t communicate with the server before the connection expired.

Try these solutions:

• Check your internet connection.
• Verify the server address and port number.
• Temporarily disable your firewall or VPN to see if they’re blocking the connection.
• Try connecting again after a few minutes if the server is experiencing temporary issues.

Permission Denied

If you can connect but can’t upload or modify files, your account may not have permission to write to that directory.

Contact your hosting provider or server administrator to confirm that your account has the necessary read and write permissions for the folder you’re trying to access.

Best Practices for Secure File Transfers

Using a secure protocol is only one part of protecting your files. Following a few simple security practices can help keep your accounts and data safe during every file transfer.

Use SFTP Whenever Possible

If your hosting provider supports both SFTP and FTPS, choose SFTP. It uses a single encrypted SSH connection, is easier to configure, and is widely supported by modern web hosting providers.

Protect Your Login Credentials

Use a strong, unique password for your FTP or SFTP account. If your server supports SSH key authentication, consider using it instead of a password for improved security.

Verify Server Certificates and Host Keys

The first time you connect, FileZilla may ask you to trust a server certificate (FTPS) or an SSH host key (SFTP). Verify that it matches the information provided by your hosting provider or server administrator before accepting it.

Keep FileZilla Updated

Install the latest version of FileZilla to benefit from security patches, bug fixes, and compatibility improvements. Keeping the application updated also helps protect against known vulnerabilities.

Use Secure Networks

Avoid uploading sensitive files over public Wi-Fi whenever possible. If you must use a public network, consider using a trusted VPN to add another layer of protection to your internet connection.

Review File Permissions

After uploading files to your server, make sure they have the correct permissions. Files or folders with overly permissive settings can create unnecessary security risks, especially on websites and shared hosting accounts.

Conclusion

FileZilla makes it easy to transfer files securely between your Windows PC and a remote server. By choosing SFTP or FTPS instead of standard FTP, you can protect your login credentials and files with encrypted connections. Whether you’re managing a website, uploading backups, or maintaining a server, using the correct protocol and following basic security best practices will help keep your file transfers safe and reliable.

Frequently Asked Questions