Subscription
The Subscription page shows the current plan, Plan Usage, and the plans you can move to. You can pay monthly or yearly. From this page you manage the card, the invoices and the cancellation.
A trial includes the higher plan's features until it ends. The Free plan stays available. File X-Ray and some other tools depend on the plan. When a tool is not included, the screen says so and links here.
Changing plan or ending the trial does not delete your records. On a smaller plan, older history can become read-only. It stays in the account. Internal accounts do not use this billing page.