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
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Kingspec 256gb Msata Ssd Internal Solid State Hard Drive Mini Sata 6gbs For Laptop Desktop Lenovo Thinkpad Ideapad - Solid State Drives - AliExpress
Finally added mSATA SSD to my T420 and now have 3 drives booting multiple operating systems, what a joy 😁 : r/thinkpad
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512GB mSATA SSD SATA III 6Gb/s For ThinkPad X220 X230 T420 T430 T430S X1 W520 | eBay