mSATA SSD on the Lenovo W520 | RunCore 120 GB mSATA SSD upgr… | Flickr
512GB mSATA 6GB/s Internal SSD MLC chip Compatible with Lenovo ThinkPad W520 Series By CMS C65 - Walmart.com - Walmart.com
W520 - SSD and Win 10 Upgrade : r/thinkpad
Amazon.com: 2nd HDD SSD Caddy for Lenovo Thinkpad T510 T520 T530 W530 W520 W510 W700DS W700 W701 T430 T420 T420i Laptop, SATA3 Second Solid State Hard Drive Enclosure, CD DVD Optical Bay