WD My Passport Ultra 2TB on Mac Yosemite 10.10.2

I have been having a problem with my 1tb WD usb drive it is not showing up, tried this but still the problem hasn’t been resolved. Wondering if one of the tech people or admin can help, I’ve a lot of data I need to gain access to.

http://community.wd.com/t5/External-Drives-for-Mac/External-drive-not-showing-up-since-update-to-yosemite/td-p/866547