What tool do you use to download system installation files? If you download based on P2P, the installation file may be damaged. You can try to download the installation files again and try to make a startup disk again.
Can BIOS view the disk information? If not, the motherboard may not support the disk. If you can view the disk, you may need to delete the hard disk partition and convert the disk format. Most likely, you need to convert it to GPT format
You can try to save no more than three quarters of the files on each hard disk. There will be no delay in the meeting. It may be caused by the hard disk, some background software, or some settings of the system itself. This may take some time to arrange.