MP ULTRA - Can't format for Mac because of error message 'Couldn't unmount disk'. HELP!

WD External and Portable SSD Portable SSD
1

Just bought MP Ultra 1TB. Trying to format for Mac according to the relevant instructions and ID.

Get to stage 9 and then get the error message ‘Couldn’t unmount the disk’. In true Cath 22 fashion the instructions say Contact Us. It’s weekend, and nobody around at WD. Need this thing to work.

ANYBODY GOT ANY IDEAS / ADVICE PLEASE ?

2

Hi and welcome to the WD community.

Try to restart the computer and the try to reformat again see if this helps with the issue. Regarding contacting support, please check out this link and deppending on your region you can contact support at the times listed:

http://support.wdc.com/contact/contact.asp?lang=en