What others things do you use your laptop for at an event besides playing music?

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I use a 2 TB portable HD for my music and 2 more for backup. I don't store music on any laptop. I used to use a regular HD but found for one thing they were too big to carry around and they could easily break. That's why I choose to switch to a portable HD. They easily fit in my laptop bag.
And monopoly? Does it not play ads?
 
Oh let me say I have another one with VDJ on it that if I choose to can get put online.