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Can I replace my Lenovo Z51-70 CPU? It's an i7-5500U which is very bad at multitasking. Can I replace the processor or the motherboard with a higher processor? - Quora
Amazon.com: 2nd HDD SSD Hard Drive Caddy for Lenovo IdeaPad Z40 Z400 Z500 Z510 Z710 Z50-70 Z50-75 Z51-70 Z50-70 Z50-70 Laptop, SATA3 Second Solid State Disk Enclosure, Internal CD DVD Optical Bay
Amazon.com: 1TB 1000GB 2.5" SSD Solid State Drive for Lenovo Z40-70 ,Z40-75,Z41-70,Z50-70,Z50-75,Z51-70,Z70-70,Z70-80 Laptop : Electronics
Inside Lenovo Z51-70 - disassembly, internal photos and upgrade options | LaptopMedia España
Lenovo Z51-70 laptop replacing hard drive. - YouTube