01-17-2019 05:35 AM
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Yes, it does. According to the Hardware maintenance manual of the computer https://download.lenovo.com/consumer/mobiles_pub/ideapad520-15ikb_520x-15ikb_hmm_201705.pdf
Storage Devices :
• HDD: 2.5-inch, 7.0 mm SATA II/SATA III
• SSD: 2.5-inch / M.2 PCIE, SATA III/M
Here's also a link for the list of compatible SSD's tested for the computer.