ThinkPad T420 Hard Drive Replacement - iFixit Repair Guide
With Bezel Front Panel 2nd Sata 2.5" Hard Drive Hdd Ssd Optical Caddy For Ibm Lenovo Thinkpad X200 X201 X220 Ultrabase - Laptop Repair Components - AliExpress
Lenovo ThinkPad T420 14.0" Black USED Laptop - Intel Core i5 2540M 2nd Gen 2.6 GHz 8GB SODIMM DDR3 SATA 2.5" 256GB SSD DVD-RW Windows 10 Pro 64-Bit - Walmart.com