Increasing the size of the System Reserved Partition without third-party software requires executing the necessary commands in Command Prompt. Therefore, this method is only for advanced users. If you ...

The easiest way I can think of is to take an image the drive using Acronis, ghost or some equivalent, and then put that image on the drive, telling ti to fill up the amount of space you want it to use ...

Sometimes installing OS X may result in odd behavior if the partition scheme on the drive is not set up properly. If you are experiencing problems, a simple repartition during setup may be an easy fix ...

No idea why the SSD isn't listed as a boot option. The only thing I can think of is that the BCD on the 4TB drive isn't configured properly, or the boot files didn't get copied properly to the EFI ...