I recently took all my files off my laptop and put them on a WD My Book. I run windows 8. I used to be able to search for files, pic, etc on my computer. But windows 8 does not seach my external hard drive. So I can no longer do searches.
Do you have a network drive My Book live or is a WD My Book external drive?
If is a external drive connected directly to your computer, you should be able to open the drive from the windows explorer to star a search on the drive.
If is a network drive and the drive is mapped on the computer, you should be able to open the mapped folder and you should be able to do a search on the drive as well.