Do you mean copying from the C300 directly to another drive somehow. That is, connecting another drive directly (sans computer) to your camera?

If that's what you are asking, I don't know any way of doing that with the C300 (I've certainly never tried). Not saying it can't be done, just that I'm unaware of it. Might check the manual. If though you mean can you do it with a computer in the field (laptop or whatever), without using the Canon utility program. Yes, it's easy.

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It's just copying and pasting (or dragging) files from the card (either in the camera or a card reader) onto another drive. All the Canon utility really does it make it easier/faster to look at a bunch of individual clips in one convenient spot all at once, rather than having to drill down through the folders for each individual clip one at a time. And, lets you see an approximation of what the LUT would look like when applied, if you choose.