Cursor jumpy

Bought a WD My Passport Ultra 1T yesterday. Plugged it in and my cursor started being hard to control.  Unplugged it and the cursor was fine.

Copied lots of files to the new WD drive.  This morning, the cursor was fine, but the little light on the WD started blinking and I couldn’t control the cursor for about 10 minutes after the light stopped blinking.

How can I get this to stop??

Hi ECogan, be sure to always safely eject the Passport before disconnecting the USB cable, if this is not done it could corrupt your files. Also be sure to connect the Passport USB cable directly to the PC. Check the link below for more information. 

How to physically connect, disconnect, and install a WD external drive in a Windows PC or Mac