Cras tincidunt nulla bibendum auctor malesuada. Duis ac condimentum mauris. Aenean auctor nunc ut dignissim imperdiet. Nam eget elementum est. Suspendisse enim massa, lobortis sit amet turpis sed, fermentum vestibulum purus. Proin at enim ut sapien ornare suscipit ut a mi. Integer aliquet tellus elit.
try using a PC and see if it can wipe the disk clean
The WD operating system is a tad useless
USB disks are less of a problem but many here suggest Synology which seems to be better for Mac users
