I buy a new 2 T HD every Black Friday, and each HD last takes about 2 years to fill, with each Drive overlapping the other by 1 year,
yes, great idea to delete, but not really worth the investment of times, when a new drive once a year cost 75 dollars (Black Friday price).
I'll delete the pictures in camera, faster then on the computer, or,, just deselect during the upload.
I agree that storage is affordable these days, but I find that deleting non-keepers is less of a time waster than sorting through all the rejects when trying to find a certain image.