Insert the M.2 2242 SSD at an angle, press down, and secure it with a small mounting screw (often not included with the laptop; you may need an M2.0 x 3mm screw). How To Upgrade the RAM in an HP ProBook 450 G2!
For users who cannot find a 2242 SATA SSD, a standard (like the Samsung 870 EVO ) is the most reliable alternative for a performance boost. NVMe SSD support in HP Probook 450 G2 hp probook 450 g2 m2 ssd compatibility