Hi @Sophie Iselin
Unfortunately if you havent paid or logged in in over a year Dropbox deletes accounts for inactivity - they send lots of emails to say this.
Have you checked you are in right account?
If there is nothing on Events and no record of deletions etc. its definitely not possible to recover anything. Paying now wont do anything as recovery window only lasts from day of purchase (i.e. it would be 30 days for files up to point you pay).
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