Upgrading SSD in HP 840 G1 EliteBook, 840 G2 or 840 G3 Laptop, Solid State Hard Drive - YouTube
Amazon.com: HP Elitebook 840 G1 14.0 Inch High Performanc Laptop Computer, Intel i5 4300U up to 2.9GHz, 16GB Memory, 256GB SSD, USB 3.0, Bluetooth, Window 10 Professional (Renewed) : Electronics