From the Modern Warfare subreddit.
Ever since the 175gb recommended specs came out people have been confused on the actual file size of the game. 175gb is what they expect the game to be at once all the post-launch content releases.
61GB makes sense for just the launch. Though if they expect 175gb by the end, makes me think they're planning a ton of post-launch stuff.
MAJOR UPDATE. TURNS OUT THE FIRST PRELOAD WAS JUST THE START.
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