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 2nd SATA SSD Hard Drive HDD Caddy for LENOVO Thinkpad T420 T430 T510 T520 T530 W510 W520 W530 W700 W701 R400 R500