Unable to access to my data from my passport ess

My laptop or desktop doesn’t show my passport ess. ever i installed the update with the same PN but never shown on 

so what to do? alot of data has i don’t like to lose it thanks

salim

Check if the drive appears on Disk Management.

Try a different cable.

There are other suggestions on the link bellow:

WD external drive is not assigned a drive letter by Windows or Mac OSX and data on the drive is inaccessible

http://wdc.custhelp.com/app/answers/detail/a_id/1164