Elitebook 840 G1 - M.2 SSD - HP Support Community - 5228442
512GB NGFF M2 2242 SSD Solid State hard drive for HP EliteBook 820 G1,840/850 G1 | eBay
Confused - Elitebook 840 G1 and the SSD m.2 slot 42mm - SAT... - Page 2 - HP Support Community - 5085271
M.2(2280)SSD can't install HP elitebook 840 G1 i7 - YouTube
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Will this M.2 SSD work with the slot in my HP Elitebook 840 G1? - Storage Devices - Linus Tech Tips
elitebook 840 g2 m.2 ssd size and compatible cards - HP Support Community - 5117937