What kind of SSD is the stock SSD that is shipped in 2012 Mac Minis? Is it a standard 2.5" configuration with the Apple logo on it? Or is it a blade style connector?
The stock Apple SSD's are 2.5" SATA in the 2012 Mini, Apple have only just put a blade style SSD in the 2014 Mini, but it still looks to have 2.5" bays.