Open Disk Utility. To open it, go to «Finder» -> Click on «Applications» in the left side bar -> double click on «Utilities» -> Double click on «Disk Utility».
Click on «View» button in top left corner and select «Show All Devices» in a drop down menu. (For MAC OS High Sierra users only, skip this step if using other MAC OS).
Click on «VectoTech media» only in the left side bar (Do not click on Rapid or any other partitions).
Click on Erase button – in the top middle menu.
Important steps 3 and 4 Common misunderstanding is trying to format «Rapid» partition and not the drive itself «VectoTech Media», this is when drive will appear as «disk2s1» or similar. Mac OS High Sierra users need to follow step 3 to show an actual drive.