I got free Lenovo T420 i put there Sata SSD 250Gb [Win 10 activated with original key for Win 7] i clean it and ive done little cooling mod [Temps drop -20C
New For Lenovo ThinkPad T420 T420i T430 T430i T510 T510i T520 T520i T530 T530i Replace 12.7mm 2nd HDD SSD Hard Drive Caddy Tray - AliExpress