Meaning of -NESN after model name

[mhauk]

Hello,
I am buying a second WDBACW0030HBK 3TB USB3 drive. This time there is a -NESN after the item's model number. What does NESN mean?

 

[rolli59]

It is hard to tell if you go to their website they do not include the name extension which is some internal code http://community.wdc.com/t5/My-Passport-for-PC/NESN/td-p/80271

 

[pjmelect]

The first digit of NESN is the type of drive it is for example UESN is a USB drive and EESN is a external drive. I don't know what the other letters stand for as all of the drives on the market that I have seen have the same suffix.