Hi there, @rltidd27.
You can use either Multi-user or Single-user mode in creating data back-up in your account because both of these modes have a task or feature to completely back up the file. For more information, you may visit this article: Features available and tasks you can perform in single or multi-user mode.
Also, you have an option to adjust user roles in QuickBooks Desktop by going to the Company tab, then select Users and Roles, and click the Edit button to review or change the access level. For the detailed guide, please visit this article: Create and manage roles.
I'll share the article about how to fix Error H202 and H505 as a future reference.
Fill me in if you have any other questions by clicking the Reply button below. I'll be around if you need any help.