What is Error Code:0

Hello there, reza-phoenixcons,

The error code 0 is when you are attempting to copy files to an external hard drive that is larger  than the size of the version on your computer.

Would it be okay if you can send a screenshot of the error. Or update this post and provide more details about the issue you're having with?

In the meantime, you can delete the browser's cache and Intuit-specific cookies. It will help fix issues when accessing QuickBooks Online. Check out the Clear cache and cookies to fix issues when using QuickBooks Online page for instructions and detailed steps.

I'll keep this post while waiting for your response. Thank you and stay safe!