In January 2016 I bought a WD My Passport Ultra 2 TB hardrive from PC World (the box packaging says exclusive edition 5 year warranty with carrying pouch). The guarantee on box states 5 years. The model no. is WDBMLA0020BBL-EESN
In March 2016 I bought what I though was the same WD My Passport Ultra 2TB hardrive from Amazon (this time the box packaging says Windows 10). The guarantee on box states 3 years. The model no. is WDBBKD0020BWT-EESN
Can anyone help explain the difference between the 3 year and 5 year guarantee? The purchases are only 3 months apart and the 5 year guarantee would assumingly be better?