It's good to have you here in the Community, Colin. 

I'd be provide insights in transferring your data.

Since you are moving your data to a higher subscription, you don't need to migrate; instead, you can take advantage of the extra capabilities available in the higher subscription. After the upgrade, your company's files will undoubtedly be accessible.

To upgrade, here's how:

1. Sign in to QuickBooks Online as a primary or company admin.
2. Go to Settings ⚙ and select Subscriptions and billing.
3. Make sure your payment info is up to date.
4. In the QuickBooks Online section, select Upgrade your plan.
5. Review the available plans and then select Choose plan.
6. Follow the on-screen steps to upgrade your plan.

However, if you want to learn about data migration in QuickBooks Online (QBO), you can check out this link to learn more about common questions about importing data to QuickBooks Online.

I also included some helpful resources to productively manage your QBO account.

• Manage billing, payment, and subscription info in QuickBooks Online.
• How to understand your subscription rates and charges.

Feel free to get back to us anytime whenever you have additional questions about managing data in QBO. We're always around to offer assistance. Keep safe, and have an awesome day ahead.