"Date created" on hard drive; cloned?
On your Mac, you can use Terminal to see the amount of data you've written to your drive.

Open Terminal and enter the "diskutil list" command.

Find your physical drive on the list, which includes partitions and virtual disks. In my case, my physical is disk0.

It is usually disk0.

Enter this command: "iostat -Id disk0" or similar (depending on the number for your drive).

You will see three values listed:

KB/t = kilobytes per transfer
xfrs = number of transfers
MB = number of megabytes transferred


The value listed under MB is the total number of megabytes that you have written to your drive from when it was first installed to now. 

In your case been 2012 model I suspect somewhere around 500GB (500,000MB) to 1000GB...or more.