Essai premium - comment annuler et conserver version gratuite ?

[Gill KS]

On a cliqué, sans faire exprès, sur un essai gratuit de la version premium. 

On souhaite conserver la version gratuite et tout les infos qu'on a dedans. 

Aujourd'hui on n'a plus que l'option de rajouter une carte de crédit pour la version premium (qu'on ne veut pas), et on s'inquiète qu'à la fin de l'essai on perd nos boards et nos infos. 

Comment faire pour rester en version gratuite sans perdre les infos ?

[Cody Curry]

Not to worry! When your workspace downgrades to Free at the end of the trial, no information will be lost.

If you have more than 10 open boards in the Workspace, the less-frequently used ones will be closed (not deleted).

How to reopen a closed board: https://help.trello.com/article/781-reopening-a-closed-board

If you're using any premium features, those would also no longer be available, but if you found them useful then you could reupgrade to Premium and all the information you added in those features (custom fields, views, advanced checklists, etc) would all return to the state they were in before the downgrade.