Best Buy has WD easystore 4TB External USB 3.0 Portable Hard Drive for $89.99 (Orig $149.99)
Shipping is free
Help preserve your memories when you're on the go with the easystore External USB 3.0 Portable Hard Drive with plug-and-play USB connectivity and WD Backup software. The backup software allows scheduling of regular automatic file transfers, and WD Discovery software makes it convenient to manage drive settings, including formatting and LED control. USB 3.0 connectivity, offers fast transfer speeds.