The fans in the consoles can get dusty and filled with pet hair etc. When this happens the console will get very loud (the fans working overtime to cool down) If your console is under warranty, this cleaning procedure is better off with the manufacturer to avoid voiding warranty. If your console is out of warranty (typically over 1 year old) this can greatly help the noise level coming from your console, not to mention extend the life of it as well. Hardrive upgrades are a great way to double overall capacity. The amount of games, apps, movies, etc can double or even triple. Fell free to ask any questions!