No need for a defragger. Ive posted this before so here it is again. Ive got a 120 GB WD HDD in a 1.0 vs XBox modded over 2 years ago, Halo was the first game ever put on that HDD, still is on it, never been erased, that game still loads as fast as day 1. Same for all other games on my Xbox. If over 700 days of using an Xbox wont make the games load slower, then theres no need for a dfragger.