External Drive is not recognized on Mac

I have two WP My Passport external hard drives. One is recognized on my mac and one is not being recognized (all of a sudden). I have tried using another cord to get the one to be recognized and it is not working. What do you suggest I do?


Try using another computer just for troubleshooting purposes.

It is also possible the partition is corrupted and you will have to format the drive in order to use it again.