You may still need to do a few more things.
In php.ini, change upload_max_filesize to 2000M, and maybe max_execution_time to 600.
Then, you may also need to reboot your server (from your control panel) so that these changes take effect.
You might have global php.ini file and a user php.ini file. I am not sure which one is controlling your Moodle install.
You might not have an info.php file in your website root, so I am attaching mine for you to move there. If you put this in your root, then type www.yourdomain.com/info.php, it will report what your server sees. You can then verify that your changes are correct. It is suggested good practice not to keep this info.php alive on your server.
You might also want to reduce the filesize limits once you do your moves so that you don't accidentally allow students to upload 1GB files to your Moodle.
Not being a Moodle administrator, I hope that I am on target with my advice. Others might be able to jump in and clarify what I am it saying.
I do site backups because my entire site is not that big. My moodledata file is now 1.3GB. This is after around 500 students, 20 courses, and 1 1/2 years of running 2.0.