In case you need information on how to fix a hard disk crash (https://notchox.com/resources/how-to-recover-files-from-crashed-hard-drive/), the first thing to do is to see whether the problem is due to software or hardware problems. In the case where the drive is recognized, then you can retrieve your files and run disk repair utilities like CHKDSK. In the case where the drive is not recognized or making strange sounds, then stop using it.