This Seagate Backup Plus 4TB USB 3.0 Desktop External Hard Drive drops from $219.99 to $159.99 and then to $139.99 using the code TEQ129679 at Tiger Direct. Even better, the shipping is free. This is the lowest price we could find for this external hard drive by $20. It can be setup to automatically backup your photos and videos posted on social media sites or backup phones and tablets using the Seagate Mobile Backup App, It also comes with software for easily backing up your PC or Mac. There is no sales tax (except FL, IL, NC, TX, GA, SD and ID).