On an external drive, the delete key is more of a suggestion than a final verdict. Files that appear to vanish from a USB stick, portable SSD, or backup hard drive often linger in the background, ...
I've had 2 Samsung SSDs (840 pro and and 805/Evo) in my MacBook Pro. But due to an upgrade have a new retina model with no internal SATA. Now I need to erase these drives so that I can sell them - but ...
This tool is great if you're cleaning out your junk drawer and don't know if an old USB stick is worth keeping around.