Hi there, CynthiaH and 4Gal.
Yes, you can convert your data to a QuickBooks Desktop file and use the trial version to access the file. However, QuickBooks Advanced is the only plan that allows you to back up a company file. For the other plans, you can export the lists.
If you need this, we recommend using a third-party app to export your documents.
Furthermore, I've added an article for you to learn how to download your data from QuickBooks Online: Export reports, lists, and other data from QuickBooks Online.
Let me know if you need anything else about managing your documents in QuickBooks Online. Don't hesitate to comment down below. Take care.