Lenovo Thinkpad T61 SSD and 2nd HDD installation - YouTube
Lenovo Thinkpad T61 256GB SSD with Caddy, 7 Pro 64-Bit and Drivers Preinstalled | eBay
IBM/Lenovo Thinkpad T61 Hard Drive Replacement - iFixit Repair Guide
Upgrade-SSD-in-Lenovo-Ideapad-330-15ICH-81FK00DKIN - English Community - LENOVO COMMUNITY
I “think” you enjoy this… T61 (256 Gb SSD Debian 10, RAM 4 Gb) and E14 2021 (upgrade with RAM 16 Gb, 1 Tb M.2 for Windows 11 and 256 Gb SSD for Debian 11, all Crucial) : r/thinkpad