You've come to the right place to get the answers you're looking for, @pragati-jain-ban.
Are you looking for the Online Back-up option in your QuickBooks Online (QBO) account? This feature is available in QuickBooks Online Advanced US at no additional charge.
It's currently unavailable in the international versions of QBO. I can see how this option would be helpful for you and your business. In the meantime, QBO does offer the support of thousands of various third-party applications for any functionality you may need. To see if there's an online back-up app, head to the Intuit App center. Then, type a keyword in the search-bar.
Stay in touch if you have any other concerns about managing your account, @pragati-jain-ban. I’ll be right here to answer them for you. Enjoy the rest of the day.