HP EliteBook 840 G3 Laptop, 14”, i5-6300U, 8GB, 256GB SSD, Refurbished – Joy Systems PC
How to install SSD on HP EliteBook 840 G2 - YouTube
SSD Upgrade for HP EliteBook 840 G5 512GB/1TB/2TB | eBay
Can we put both an HDD and an SSD in an EliteBook 840 G3? - Quora
512GB NGFF M2 2242 SSD Solid State hard drive for HP EliteBook 820 G1,840/850 G1 | eBay
Refurbished: HP EliteBook 840 G4 14" Laptop, Intel i5 7300U 2.6GHz, 16GB DDR4 RAM, 256GB M.2 SSD Hard Drive, USB Type C, Webcam, Windows 10 Pro - Newegg.com
HP EliteBook 840 G6 Crucial 500Gb NVMe M.2 Ssd Solid State Drive CT500P1SSD8