How can i get back up ? I can not see any option in setting about get backup .

You can utilize a 3rd party backup restore app.

https://rewindio.grsm.io/quickbooks

Hi there, mohammad-k-katri.

Let me help you back up the data on your QuickBooks company file. QuickBooks Online (QBO) automatically backs your data up. 

However, the backup and restore option is available in QuickBooks Online Advanced. You can look for a third-party app that can do QuickBooks Online backups. There are apps in the QuickBooks App store that provide this continuous backup.

On the other hand, you also want to save a copy of your data directly saved on your computer by exporting reports and lists.

Here are the steps you can follow.

1. Go to the Settings ⚙ icon from the toolbar.
2. Under Tools, select Export Data.
3. On the Reports tab, set the date range.
4. Add or remove items from the Reports and Lists tabs by toggling the slider.
5. Select Export to Excel. 

You can easily download the data entered into your file to your local hard drive. I'm adding this article as your guide: Export data, reports, lists, and more from QuickBooks Online.

Get back to me if there's anything else you need help with. I'm always around to answer whenever you have follow-up questions.