To connect to an Amazon EC2 file directory using FileZilla and SFTP (Secure File Transfer Protocol), you need to import private key file.

Install FileZilla: Download and install FileZilla from the official website (https://filezilla-project.org/) if you haven't already.

Obtain your EC2 instance's public IP address or DNS name: You can find this information in the Amazon EC2 console. Make sure your EC2 instance is running and note down its public IP address or DNS name.

Generate a key pair (optional): If you haven't already, you can generate a key pair for secure authentication. This step is optional, as you can also use username/password authentication.

Configure security group settings: Ensure that your EC2 instance's security group allows inbound connections on port 22 (SSH) from your IP address or a range of IP addresses you want to connect from. This step is necessary for SFTP access.

Launch FileZilla: Open FileZilla on your local machine.

Configure FileZilla settings: Go to "Edit" -> "Settings" in the FileZilla menu.

In the "Connection" section, click on "SFTP" and  (if you gadd your private key fileenerated a key pair) or choose "Ask for password" if you want to use username/password authentication.

In the "File editing" section, choose your preferred text editor.

In the "File exists action" section, choose your preferred option for handling file conflicts.

Click on "OK" to save the settings.

Connect to your EC2 instance: Click on "File" -> "Site Manager" in the FileZilla menu to open the Site Manager.

Click on "New Site" and provide a name for your site (e.g., "EC2 SFTP").

Enter the following details:

Host: Enter the public IP address or DNS name of your EC2 instance.
Port: Set it to 22.
Protocol: Choose "SFTP - SSH File Transfer Protocol."
Logon Type: If you generated a key pair, choose "Key file" and browse to your private key file. Otherwise, choose "Normal" and enter your username and password.
User: Enter the username associated with your EC2 instance (e.g., "ec2-user" for Amazon Linux).
Click on "Connect" to save the site settings and connect to your EC2 instance.

Transfer files: Once connected, you should see the remote directory of your EC2 instance on the right-hand side of FileZilla. On the left-hand side, navigate to the local directory containing the files you want to transfer.

To upload files from your local machine to the EC2 instance, simply drag and drop them from the left pane to the right pane.

To download files from the EC2 instance to your local machine, drag and drop them from the right pane to the left pane.

That's it! You should now be able to connect to your Amazon EC2 file directory using FileZilla and SFTP. Remember to manage your security settings and key pairs appropriately for secure access to your EC2 instance.