on my m1 Mac Pro laptop my external hard is not detected

If your external hard drive is not being detected on your M1 Mac Pro laptop, there are several steps you can take to troubleshoot the issue:

1. Check the Connections: Ensure that the external hard drive is properly connected to your M1 Mac Pro and that the cables are securely plugged in. Try using a different USB-C port or cable if available.
2. Restart Your Mac: Sometimes, a simple restart can resolve connectivity issues. Restart your M1 Mac Pro and see if the external hard drive is recognized afterward.
3. Check Disk Utility: Open Disk Utility on your Mac (you can find it in Applications > Utilities). See if the external hard drive appears in the list on the left-hand side. If it does, but shows as grayed out or with an error message, you might need to repair the disk.
4. Test with Another Device: Try connecting the external hard drive to another computer to see if it's recognized there. If it is, then the issue may be with your M1 Mac Pro.
5. Check Power Supply: Some external hard drives require an external power supply. Make sure that the external hard drive is receiving power if it needs it.
6. Update macOS: Make sure your M1 Mac Pro is running the latest version of macOS. Updates often include bug fixes and improvements that could resolve compatibility issues.
7. Check for Driver Updates: If the external hard drive came with any drivers or software, ensure that they are up to date.
8. Reset SMC and NVRAM: Resetting the System Management Controller (SMC) and Non-Volatile Random-Access Memory (NVRAM) can sometimes resolve hardware-related issues. Instructions for resetting these can be found on Apple's support website.
9. Try Another Computer: If possible, try connecting the external hard drive to another computer (preferably another Mac) to see if it's recognized. This can help determine if the issue is with the external hard drive itself or your M1 Mac Pro.