You get what you pay for, you will struggle to get a better external for that price.
In fact you will struggle to get a external for that price. It comes with all the media and taps needed which are usually extra purchases.
Save up and get something you can actually relay on. I am only 16 but my fish come first and if they need new equipment I make sure i get them decent stuff. There is absolutely no skimping on a purchase. You will only regret it later.