HD stopped being recognised after deleting files

WDBPCK0010BBK-03 is no longer recognised by my Mac (OSX 10.9.5) after I deleted files from it. How can I resolve this?

Erasing files should not affect disk recognition. I recommend confirming if your hard drive is detected within Disk Utility, and if it allows for the drive to be repaired:

http://wdc.custhelp.com/app/answers/detail/a_id/866/

Regards,

Thanks for your reply.  I tried it on three different computers without success. Then a couple of hours later it suddenly appeared. Very strange. No problems since.