New HDD for a laptop.

does it have space for another drive?

as in 2 hdds total inside the laptop

Also id like to know is it possible to make a 15mm HDD fit inside by shaving it a bit with a a grinder or sander?

 
If you "modify" the bottom housing, you can get a 15mm to fit. But by default it will not. I'm assuming you want to use one of those WD 2TB 2.5 HD's?... Both of my gaming laptops have a Samsung 960 Evo 250GB M.2 SSD(Windows install) and 2TB Seagate FireCuda SSHD's installed.
 
Ive heard rumors of those seagate firecudas just crashing after a few months of use how long have you used yours? iit spins at 5400rpm right?

 
Hey whats the input and output copy rate on your SSHD, from USB to Laptop and Laptop to laptop?

 
I meant within the same laptop you have. So is it faster than a 7200 rpm hdd?