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After download a game and delete it for download others games, and download again the first for play one more time... Making this several times, I fear the hard disk will be fragmented, wich may cause system load speed down...
There is no defrag utility on the 360 and generally it is not needed. You can clear the System Cache which clears up most issues (which does perform some hard drive maintenance). If you feel your hard drive has become fragmented to such a degree that it
is affecting performance and clearing the system cache does not help, then you can format your hard drive and reload your games, apps, and DLC. Make sure you backup all your game save files before doing this (on a USB drive) as the format will completely erase
the hard drive.
I did have to reformat my drive once when Oblivion was running very slow, but this was many years ago and the hard drive was one of the original 20GB models. I'd only use this as a last resort as it can be a pain to reload all your content again, especially
with the current hard drive sizes.
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