CHIPAL Aluminum SATA 3.0 2nd HDD Caddy 9.5mm for 2.5" SSD Case HDD Enclosure for Lenovo ThinkPad T400 T500 W500 T410 ODD CD ROM|HDD Enclosure| - AliExpress
Lenovo ThinkPad T400 Hard Drive Replacement - iFixit Repair Guide
CHIPAL 2nd HDD Caddy 9.5mm SATA 3.0 for 2.5" 2TB SSD HDD Enclosure for Lenovo ThinkPad T400 T400s T500 W500 T410 DVD ROM CD ROM|HDD Enclosure| - AliExpress
Another old form factor T400 project finished 2day. Win10 and SSD upgrade 😇👌🏽. : r/thinkpad
2nd Hard Drive HDD/SSD Caddy For Lenovo Thinkpad T400 T410 T500 - Newegg.com