How to give your 2012 or 2014 Mac mini a performance boost by replacing the hard drive with an SSD | AppleInsider
Amazon.com: Sinobright Original 128GB PCI-e SSD Replacement for MacBook Pro Late 2013 - Mid 2014, MacBook Air Mid 2013 - Early 2014, iMac Late 2013 - Mid 2015, Mac Mini Late 2014 (Bulk, No Retail Packaging) : Electronics