lowest ever as per CCC
$22.85 per TB
Amazon product: WD 14TB My Book Desktop External Hard Drive, USB 3.0 – WDBBGB0140HBK-NESN,Black
If looking at large external storage cost per TB in most cases the 8tb external devices of the most cost effective per TB. I selected this in order to have just 1 external device (rather than 2) for my purpose (music/movie storage).