Putting M.2 SSD in Thinkpad X230 (possible, but requies modification) : r/ thinkpad
Lenovo ThinkPad X230 12.5 Laptop, Intel Core I3-3130M 2.6Ghz, 4G DDR3, 240G SSD, USB 3.0, VGA, miniDP, W10P64-Multi Languages Support (EN/ES/FR), 1 year warranty Used Grade A - Walmart.com
04Y2133 Lenovo 256GB MLC SATA 6Gbps (Opal) 2.5-inch Internal Solid State Drive (SSD) for ThinkPad
Amazon.com: 1TB 1000GB 2.5" SSD Solid State Drive for Lenovo ThinkPad X60,X61,X200,X201,X201i,X220,X220i,X230,X230i Tablet : Electronics
One of my x230's final upgrades - a 1TB mSATA drive : r/thinkpad
Building the Perfect ThinkPad X230 Part 1: Complete Disassembly, Re-pasting, Fan, SSD, RAM - YouTube
Used Diagnostic Tablet Lenovo Thinkpad X230 Core I5 I7 3rd Gen 2.60ghz 4gb/8gb/16gb Ram Office Ssd Windows 10 Laptop Battery - Obd External Equipment - AliExpress
Lenovo X230 12.5" Laptop Notebook Computer 3rd Gen i5-3320 2.60GHz 8GB 256GB SSD Windows 10 Pro