To restore a website backup using FTP, follow these general steps:

Step 1: Connect to the FTP server: Use an FTP client like FileZilla to connect to the FTP server where your website is hosted. Enter the FTP server details (server address, username, password, port number if different from the default) in the FTP client's connection settings and establish a connection.

Step 2: Locate the backup files: Once connected to the FTP server, navigate to the directory or folder where your website backup files are stored. This location may vary depending on your specific server setup or backup configuration.

Step 3: Upload backup files: In the local computer side of the FTP client (usually displayed on the left side), locate the backup files on your computer. Select the backup files and upload them to the appropriate location on the FTP server by either dragging and dropping the files to the remote server side or using the FTP client's upload feature.

Step 4: Overwrite existing files: If the backup contains files with the same names as the ones already present on the FTP server, you may need to confirm overwriting those files. Depending on the FTP client, you may be prompted to choose the desired action for conflicting files, such as overwriting, skipping, or renaming them.

Step 5: Verify the restoration: After the backup files have been uploaded, verify that the restoration was successful. You can do this by checking that the files and directories in the FTP server match the structure and content of your original website before the backup.

It's important to note that the exact steps and procedures for restoring a website backup using FTP may vary depending on your specific hosting environment, backup format, and FTP client software being used.

Therefore, it's recommended to consult your hosting provider's documentation or support resources for any specific instructions or best practices relevant to your situation.