SSD Upgrade for Lenovo ThinkPad T520 256GB/512GB/1TB/2TB | eBay
Lenovo Thinkpad T520 Disassembly video 4K, upgrade RAM & SSD, take a part, how to open - YouTube
Retrofitting a Lenovo T520 with a Raspberry Pi CM4 - Part 1 - Dave Was Here
Amazon.com: Lenovo ThinkPad T520 Laptop Notebook - Intel Core i5 2.5GHz - 8GB DDR3 - 128GB SSD - 15.6in Display- DVD - Windows 10 Pro (Renewed) : Electronics
My upgraded T520. Including a spare M.2 mounted on...the ultrabay, a new battery, and a quad i7 (originally a dual i5) Running a retro themed Q4OS. : r/thinkpad