A quick picture guide to upgrading the RAM on a Lenovo ThinkPad T430 : Global Nerdy
T420] RAM Stick won't fit in slot : r/thinkpad
HD] Installing RAM on a Lenovo Thinkpad T420 Guide T410 T400 - YouTube
16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com