Amazon.co.jp: HADTK 128GB 2242 NGFF (M.2 SATA) Internal SSD with 3D NAND Chip Compatible with Thinkpad X240 X240s X250 T440 : Computers
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Lenovo x240 Samsung 256GB SATA 2.5" SSD Solid State Drive MZ-7TE2560 04X4470
Amazon.com: Lenovo ThinkPad X240 12.5-inch Business Laptop, Intel Core i7-4600U up to 3.3GHz, 8G DDR3L, 500G, WiFi, VGA, Mini DP, USB 3.0, Win 10 64 Bit Multi-Language Support (Renewed)