To connect to file systems from Windows instances, the NFS Client must first be installed. Be sure to follow the installation procedure found in Mounting File Systems From Windows Instances before proceeding with troubleshooting.
Symptom: After installing Windows NFS client, you can successfully mount the file system from Windows, but the file system drive is not visible in File Explorer.
Cause: A standard user is trying to access a file system that was mounted using the Administrator: Command Prompt (CMD). When mounting file systems, it isn't necessary to run the Command Prompt as Administrator.
Solution: Unmount the file system and then remount the file system using a standard Command Prompt. (CMD) See To remount a file system with a standard Command Prompt (CMD).