Thank you for posting here on the Community page, pubaid813-gmail-.
I'd like to provide some information regarding backing up in QuickBooks Online.
Currently, the option to back up your data is unavailable in QuickBooks Online. This newly added feature is only available in the Advanced subscription of QuickBooks. To learn more about this and to know what data gets backed up, refer to these articles:
However, you can export the following reports and lists into individual Excel files. Check this article for more information: Export reports, lists, and other data from QuickBooks Online.
On the other hand, you can look for a third-party app in the Apps Center to back up your QuickBooks data. Simply log in to your QBO account, then go to the Apps menu and search for the app.
Additionally, check our Plans & Pricing page to view the tools available for each subscription in QBO.
Stay in touch with me if there's anything else you need by commenting below. I'll stay around until you're able to successfully create a backup copy of your data.