Why this happens
Dropbox warns that deleting the application or allowing the card to expire does not reliably end the subscription. The paid contract is managed separately, and payment information can be updated through billing systems. A proper cancellation leaves a confirmation and an effective downgrade date that these indirect actions do not provide.
What to do
- Sign in to the account that owns the paid plan and identify whether Dropbox or a store bills it.
- For direct individual billing, open Manage account, choose Cancel plan and finish the confirmation; use the store for a store purchase.
- Save the non-renewal confirmation and prepare your files for the lower storage allowance at the end of the period.
Check the result
If you already removed the app, use a browser to manage the contract. Do not treat a failed payment or an expired card as proof that the plan was canceled.
Official sources
Check the linked provider instructions for your plan, country and purchase channel. This independent guide does not cancel a subscription for you.
Full Dropbox cancellation guide