Probably more effort than it's worth to process the evidence into a form that would be comprehensible to a jury, and the case may still not be won. They may have been hoping for a plea-bargain or a voluntary return to the States (he's in Panama), and he called their bluff.

Also, the data may need to be held on certain specific servers to preserve chain of custody -- it's not as simple as buying a few 1TB drives, and uploading evidence to the "cloud" would break more than a few privacy rules