ArtPog :
Re: your 3 TB HDD...we'll assume this drive boots & functions without problems when it's connected as your boot drive, right?
By any chance has it been GPT-partitioned?
How were you able to clone the contents of the 3 TB disk to the 240 GB disk? Your SSD's disk-space capacity was sufficient to contain the TOTAL data contents of the larger disk? Or were you able to just clone the OS from the source disk?
When your SSD is installed as a secondary drive in your system have you determined the cloned SSD has also been partitioned with the GPT scheme?
You mentioned that when you access the boot menu upon bootup with the SSD connected as the (hopefully) boot drive, the boot menu lists the boot devices as "general options like CD Drive, Hard Disk, etc.". What's the "etc."? And SPECIFICALLY, how is the SSD identified?
What's your make/model of your motherboard?
I keep my HDD clean, so as of right now its about 180gb of files on it, not much at all (cleaned up a lot for this clone). I cloned it through the recommended cloner (http://www.apricorn.com/products/software/sandisk).
https://gyazo.com/fd8812f41b4d6270ffce11b26093486c
Disk 0 = 3tb HDD (Primary boot atm because I want to use my computer)
Disk 1 = 240gb SSD
Disk 2 = small flash drive
From what I believe its GPT (https://gyazo.com/26497a7af8562b19c0cfd8bd40e08c5a)
The etc. being: USB Key, CD/DVD, Hard Disk, Network, USB Hard Disk, USB CD/DVD, (none of these give me an actual name of a drive unless I use legacy mode)
The SSD is identified with the name of my ssd then a bunch of numbers behind it, I can get that exactly later, but not atm if its truly needed.
Motherboard: Alienware OFPV4P (im well aware of your response to alienware, I had to purchase through dell because of a financial situation, im also well aware it was a bad idea.)