Cisco Nexus 9000 Series NX-OS Release Notes, Release 10.2(4)M
Standard practice involves transferring the file to the switch's bootflash via drive, then using the install all command to perform the upgrade. specific version of NX-OS (like 10.x or 9.x) for a particular Nexus model nxos64cs1024mbin download link
Disclaimer: Cisco, NX-OS, and Nexus are registered trademarks of Cisco Systems, Inc. This article is for educational and informational purposes regarding software procurement best practices. Always comply with software licensing agreements. Cisco Nexus 9000 Series NX-OS Release Notes, Release 10
The official and secure method to obtain this file is through the Cisco Software Central Official Link: Cisco Software Download - Nexus 9000 Series Access Requirements: You must have a valid Cisco.com ID and an active service contract nxos64cs1024mbin download link