Beach Camera via eBay offers the Seagate Backup Plus 4TB USB 3.0 External Hard Drive for $113.19. Checkout with PayPal and apply coupon code "PSUMMER20" to drop it to $90.55. With free shipping, that's a buck under our mention from last month, the lowest price we've seen, and the best deal now by $12. It features mobile backup via an app for both iOS and Android devices. Deal ends June 20.
Note: Coupon can be used once per PayPal account within a single transaction.