I'll be glad to walk through the steps on how you can restore your backup in QuickBooks, @sheldon211.

Since your backup company file is on an external device, you'll need to move it to your local hard drive first. Then, follow these steps to restore your company file in QuickBooks Desktop:

1. In QuickBooks, go to the File menu and select Open or Restore Company.
2. Click Restore a backup copy and select Next.
3. Choose Local Backup, then click Next.
4. Browse your computer for your backup company file. It should look like this: [Your company name].qbb.
5. Select a folder to decide where to save your restored company file. Then, click Open.
6. When you're ready, select Save.

In case you run into problems restoring your backup file, here's how to fix them.
 

You can always tag me in the comment section if you have further questions about restoring your previous company file. I'll always have your back.