4 lanes. From the product specs: M.2 SSD / PCIe NVMe, PCIe 3.0 x 4, 32Gb/s
__________________________________________________________________________ I do not work for Lenovo. I do not respond to Private Messages for help, your questions should be posted in the appropriate forum where the information exchange may help others. If I helped you, click the 'Kudos' button, if solved, the 'Accept as Solution'.