How to give your 2012 or 2014 Mac mini a performance boost by replacing the hard drive with an SSD | AppleInsider
OWC 1TB Aura Pro X SSD Add-On Kit for Mac mini OWCS3DAPB4MM10K
Amazon.com: Sintech M.2 NGFF NVMe SSD Card for Upgrade Mac Mini Late 2014 Year A1347 MEG Series(Only for late 2014 Year,not fit Other year) : Electronics