BuyDig via Rakuten offers the Seagate Backup Plus 4TB USB 3.0 External Hard Drive for $94.99. Coupon code "BF20" cuts that to $76. (You must sign in to your Rakuten account to use the code.) With free shipping, that's $4 under our mention from two weeks ago and the best outright price we've seen. (It's also a low by $23.) It features mobile backup via its app for iOS or Android. Deal ends November 24.