Lenovo ThinkPad T420 I5-2520M 2.50GHZ 4GB 320GB HDD NO OS 14" (0078) – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE
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Ultrabay SATA 2nd HDD Hard Drive Caddy for Lenovo ThinkPad T420 T520 T420i T510 | eBay
Lenovo ThinkPad T420 T520 500GB Hard Drive, w/ 10 Home 64 & Drivers Preinstalled | eBay