Good deal for a 4TB portable external drive. $169.99 down to 149.99 using MYNLSALE2019 coupon code.
There are a couple of other 4TB portable external drives at the same price but I figured the red was the best for the reason that it has an aluminum casing, 3 years warranty and the auto backup software. I'll list them below and the reason why I think they're inferior than the posted product.
Seagate Expansion 4TB USB 3 Portable Hard Drive - Has 3 years warranty as well but plastic casing and more bulky.
WD Elements SE Portable 4TB USB 3.0 External HDD - Only 2 years warranty and plastic casing.
Seagate Backup Plus Portable 4TB Black - Basically same as the red but only with 2 years warranty.
Seems like the red might just have 2 years warranty as well. If you scroll down the bottom of the product description, it says 2 years warranty in the specifications table. It does say 3 years on the top part of the overview.
If this is the case, then the black would exactly be the same value as the red and you might want to consider the Seagate Expansion 4TB USB 3 Portable Hard Drive for an extended warranty but with a plastic case.
Take note though that when I checked amazon for warranty details of Seagate Expansion 4TB USB 3 Portable Hard Drive, it says that it only has a 1 year warranty. Checked both WD Elements SE Portable 4TB USB 3.0 External HDD and Seagate Backup Plus Portable 4TB in amazon as well and they both have 2 years warranty under their product description.
Links to amazon pages for the products will be posted below.