Today (1/24/17) only, Fry's Electronics has this
WD 3TB Silver My Passport Ultra Metal Edition Portable External Hard Drive : WDBEZW0030BSL-NESN $129.99 - $30.99 (today's 1/24/17 promo code: 3305102) + Free S/H = $99.00. I may be wrong, but I believe internally this is a 2.5" SATA HDD.