You don't need these dash update files they are only for Xbox Live.
\dashupdate.xbe
\update.xbe
You don't need Dutch, Spanish, French, or Italian Screens and Sounds if you play games in English.
\Default\screens\deu
\Default\screens\esp
\Default\screens\fra
\Default\screens\ita
\Default\sounds\deu
\Default\sounds\esp
\Default\sounds\fra
\Default\sounds\ita
Finally you don't need PAL Videos if you play games on an NTSC TV.
\VideosPal
You just saved 2.44 GB.
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Game Deletion Thread
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