w2k19 caws unusable on external harddrive

I can re-backup my computer using Time Machine later. Do I just need to bite the bullet and buy a new drive(and be more careful in the future), or is there something I can do? I really don't care about the files on there. But for some reason seems completely unusable. The hard drive is on, glowing, and humming trying to do what I tell it. for the new partition and click 'OK' to continue.

Adjust the partition size, file system (Choose the file system based on your need), label, etc. I even tried using terminal commands to do all these tasks. On the main window, right-click on the unallocated space on your hard drive or external storage device and select 'Create'. Back up as many or your files as possible, reformat the disk, and restore your backed-up files.' So I tried to erase and reformat the disk, but then is says, 'Couldn't unmount the disk.' I tried ejecting it and mounting it without success. I tried to repair using Disk Utility, but it said 'Error: Disk Utility can't repair this disk. Besides, there are many other reasons could cause your external hard drive inaccessible, like hard drive broken, the USB power supply of removable device is insufficient, etc. It was working great, but I think I accidentally disconnected it without properly ejecting. If you use Bitlocker to encrypt your hard drive, you may meet the problem that external hard drive recognized but not accessible and your important files cannot be used.

So I have been using tho Seagate 500GB hard drive as a Time Machine backup.

W2k19 caws unusable on external harddrive