Hey, I use the 2.5" bay, it's the only way to have decent cheap mass storage. This is a desktop replacement. In fact, I'm using the GT62VR to type this, and right now I'm utilizing 8 of the I/O ports, one of which is a 2TB 2.5" SSD hooked up to USB that I will install internally later.
The only I/O I don't personally use is audio line-in. And, the type-C port, ironically. Rarely read/write SD cards.
I would use the type-C port so much more if it supported displayport alternate mode. As it is, I have an MB16AC monitor that supports both DP-Alt mode and some emulated displayport-over-USB3, and on the GT62VR I can only use it while connected to a USB 3.1 gen 1 type-A port, limiting the monitor's frame rate (it's a variable frame rate, oddly). My cheaper laptops have DP-Alt mode on their type-C ports!
I understand that this GT63 is simply the GT62 with better CPU and GPU, but it's annoying that the best laptop in one's home would be the only one with a crippled type-C port. I think it ought to have two, both supporting TB3. And two M.2 slots.
Please, MSI! The type-C port is practically a deal-breaker were I to want to upgrade.