If you have an scp client on your local machine you can use scp to transfer files over ssh.

You can also use an SFTP client like Filezilla to upload your files. To use filezilla you will set up a connection with the following details:

Protocol: SFTP
Port: 22
Server: [your droplet’s IP]
User: root
Password: [ your droplet’s root password]

This will start you off in the /root directory but you are not locked in this directory. If you are using Apache to serve your web files the default web root is /var/www/html. If you’re using nginx it would be /usr/share/nginx/html

You can install Apache with the commands:

apt-get update;
apt-get install apache2;

Or nginx with:

apt-get update;
apt-get install nginx;