For being 4TBs, the size is comparable to the 1 & 2TB models. Usually 3TBs & up they are desktop size and too large/heavy to lug around. This is a GREAT storage solution, perfect for Mac's Time Machine. I would like to point out that it works MUCH better for MAC users after you use Disk Utility to format your external HD to journaled. It works out of the box, but it has been my experience that to R/W & RW you *need* to do this if you are jumping from machine to machine. I love this model. It's faster and better than the Back Up Plus Slim. Out of My WD and other Seagates, it is my favorite. I would HIGHLY recommend it. Also, the price is INSANELY low for 4TB!

Within in the past two years, it seems that Seagate drives have been more reliable on the Mac platform than WD drives. With 4TBs, I can partition this drive to serve as at persistent Time Machine backup, as well as a storage destination for day-to-day documents and projects. I like this drive so much I bought two.

About two years ago (2014) I purchased the Seagate 1TB external drive and now present day 8/2016 I needed more space. After looking at numerous products I turned once again to Seagate. I was able to buy a drive with 4x the capacity (4TB) for about the same price I did in 2014. The drive is slightly taller but given the increased space it was an acceptable trade off. I use this drive primarily for backups while being mobile with my Macbook.

NIce compact size with lots of storage space. I like the fact that it is powered through the USB cable. I use it with my MacBook and keep it in my computer bag so I can do a backup wherever I am and whenever I want. Easy to use.

It's a hard drive. It hold 4TB. My old one only held 2TB, and it was getting full. Now, I have plenty of space, with the speed boost of USB 3.0. And, of course, an extra 2TB of space. Let's hear it for true Plug and Play! I DID recommend this to a friend.... she bought one, too.