There are a few things you can try to fix an unresponsive hard drive:
1. Restart your computer. This will sometimes fix the problem if the hard drive was just having a temporary issue.
2. Check the connections. Make sure the hard drive is properly plugged into the power supply and the computer.
3. Run a disk check. This will scan the hard drive for errors and try to fix them.
4. Format the hard drive. This will erase all the data on the hard drive, so make sure you have backups of your important files before doing this.
5. Contact a professional. If none of the above solutions work, then you may need to replace the hard drive.