Solved: Adding M.2 SSD to EliteBook 850 G2 (J8R65EA) - HP Support Community - 5920770
HP® EliteBook 840
Amazon.com: HP Elitebook 840 G3 Business Laptop Computer: 14 FHD/ Intel Core i7-6600U up to 3.4GHz/ 16GB DDR4 RAM/ 256GB SSD/ 802.11ac WiFi/ Bluetooth 4.2/ USB Type-C/ Windows 10 Professional (Renewed) : Electronics