That's exactly what I was going to say! Thanks, Cory.
It would be extremely wise to 1) purchase an external drive, and 2) start doing backups ASAP. You are definitely asking for trouble with having no backups.
A number of folks come here for help, and yet they have no backups. In fact, one individual posted an issue about their machine not being able to accept keyboard input, in some instances. That individual could not use the machine to complete a critical deadline. All the critical information was on the internal drive. Bur there was no backup, and thus we could not provide any meaningful/safe assistance.
Similar circumstances have occurred with other individuals posting here. The moral of the story is, of course, to make frequent backups to an external device.