Hi there, @Lizber.
The possible reasons you're unable to restore the backup copy are the filename has special characters, or the backup has been made in a newer version but is being restored to an older version
You'll have to change the name of your company file and its location so you'll be able to restore it successfully. I'll guide you how.
Change the file name:
- Go to the location where your company file is currently saved.
- Right-click the file and click Rename.
- Change the file name and press Enter.
- Click Yes to confirm the action.
Change the file location:
- Go to the location where your file is currently saved.
- Right-click your company file, then select Copy.
- Go to another location, you can either choose on the desktop or a new folder to paste the company file.
Once done, you can now restore the backup of your company file.
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I'm just a few clicks away if you have additional questions in restoring your file. Have a great day!