Well, yeah, that's pretty much what I've mentioned up in my reply.
I have an USB 3.0 2TB External HDD that works great, but I've thought about taking out the laptops HDD and putting in the SSD instead. But that leaves me with a perfectly functioning HDD that isn't in use. So, I thought about buying a caddy to put it into the optical drive bay. You can actually hotswap the optical drive and the HDD depending on which one you need.
http://hddcaddy.com/en/asus-hdd-caddy/877-asus-g56jr-hdd-caddy.htmlIt like this one because it's made just for the G56JR. And then you can take the optical drive and put it in one of
these.
P.S. Maybe you're thinking why would I buy 2 things, a HDD caddy and a DVD drive bay, instead of buying only one, the HDD bay, so I could leave the optical drive in.
The reason is; I don't really use the optical drive very often.
Maybe 2-3 times in a couple of months.
So I'd rather have the HDD in in-case of taking the laptop with me somewhere and avoiding the hassle of taking the big-ass 3.5" external drive with the AC adapter with me.