elitebook 840 g2 m.2 ssd size and compatible cards - HP Support Community - 5117937
Amazon.in: Buy OSCOO 256GB m.2 2242 Solid State Disk High Speed SATA3 for Hp 840 G1 G2, 9480M, Lenovo X240, X250, T440, T450, T450s, T440s Online at Low Prices in India