Amazon has the WD Elements 4TB External USB 3.0 Portable Hard Drive, model no. WDBU6Y0040BBK-WESN, for $89.99 (139.99 – 50 instant savings) with Free Shipping for a limited time.

The 4TB Western Digital hard drive features durable construction that protects against shock, and USB 3.0 technology that facilitates rapid data transfer to keep you working efficiently. It comes with WD Backup software that quietly helps you preserve your data using minimal PC resources.

Amazon has the Western Digital 4TB My Passport USB 3.0 Portable External Hard Drive in black, model no. WDBYFT0040, for $54.99 (149.99 – 95 instant savings) with Free Shipping for a limited time. It’s currently out of stock but if you order now you can lock in the price and Amazon will ship it out as soon as it comes back into stock.

My Passport is the trusted, portable storage that perfectly complements your on-the-go lifestyle. Designed to fit in the palm of your hand, there’s plenty of space to store a massive amount of photos, videos, music, and documents. Perfectly paired with WD Backup software and password protection, the My Passport drive helps keep your files safe. It features transfer rates up to 5Gb/s and 256-bit AES hardware encryption.