Is that Y cable the right configuration looks like you still have to have the power brick pretty close to the SP3.If you use a portable size drive, you'll want to get a 6' "split" USB cable (unless you already have another plan worked out) to reach from the drive, to the Surface Pro power brick USB port. I have seen several people complaining that USB port on the SP3 itself can't power the drive. But the cord from the wall to the power brick is so short, and the distance from the SP3 to the brick so long, that's difficult to get power from the brick and still plug the drive into the SP3.
This is what I got for my drives... http://amzn.com/B00439567Q
If you use a portable size drive, you'll want to get a 6' "split" USB cable (unless you already have another plan worked out) to reach from the drive, to the Surface Pro power brick USB port. I have seen several people complaining that USB port on the SP3 itself can't power the drive. But the cord from the wall to the power brick is so short, and the distance from the SP3 to the brick so long, that's difficult to get power from the brick and still plug the drive into the SP3.
This is what I got for my drives... http://amzn.com/B00439567Q
I know we're talking about 2TB drives, but I wanted to put a word in for the Oyen Digital U32 Shadow™ 480GB External USB 3.0 Portable Solid State Drive. At $289 it's pricey, but not for an external SSD. The thing is lightning fast on my SP3 and requires no additional power. It works like a charm. When you are working with multiple VMs like I am, this is the way to go, but even for storing media and other files, this thing rocks. You can find it on Amazon's web site.
With a current catalog of 750gb of pics, this might not work. ;-)
Is that Y cable the right configuration looks like you still have to have the power brick pretty close to the SP3.
I'm confused, you said in your original post that you don't always need the pictures with you, and then later you said you do. Which is it?
I would be scared to carry that much data around if that's your only backup source. I would synchronize a portable 2TB drive with a mirrored or RAID NAS setup that is secure at home/office.
Just get one of these with two 1TB SSDs.