Here is a list of things to help troubleshoot your network drive:

1. Verify that your computer is connected to the network
2. Verify that the share is correctly mapped on your computer
3. Verify your user has the required permissions for the drive
4. Check the network drive for potential viruses and malware
5. Check its drivers, and update as necessary
6. Ensure the network cable is properly connected to the server
7. Run an anti-virus scan if necessary
8. Check the network drive for compatibility issues
9. Make sure the network drive is shared over the network
10. Check for any new updates to the network drive