I'm trying to respond the email I sent was sent bk to me, so I use WD passport to back up my Mac about a weeks ago I notice it wasn't backing up anymore this was after I added the WD security app feature, but I could still add my pics to my passport, on Friday I went to put some pics on it and all of my pictures disappeared, I contacted Apple care they told me to hold command + R, I did that the disk utility came up but I must have done something wrong because it kept saying I didn't have enough room to re install, than there was no image of a disk start up and now I get a globe that says -2001. I was getting a blinking ? Mark folder