Do a 5V MSATA SSD will work on T420 or it should be 3.3V? : r/thinkpad
Adding an mSATA SSD to a Thinkpad T420
Lenovo ThinkPad T420/T420i - iFixit
My T420 (i7-2630QM ans 8GB DDR3 with 128GB mSATA SSD and 7200RPM HDD) is actually one of the more powerful laptops on campus, which suprised me. : r/thinkpad
Amazon.com: Laptop Wireless Network Adapter for Lenovo Thinkpad T420i T420S, Mini PCI E 2.4G/450Mbps 5G/450Mbps WiFi Network Card Chip for Intel 6300AGN, System for win7/win8/win10 : Electronics
Lenovo ThinkPad T420s Review - YouTube
Amazon.com: CMS 128GB mSATA 6GB/s Internal SSD Compatible with Lenovo ThinkPad T420 Series - C29 : Electronics