If you are the Family manager of a Dropbox Family plan, you can cancel your subscription at any time. The cancellation will go into effect at the end of your current billing cycle.
When the subscription ends:
To cancel a Dropbox Family plan:
Note: While only Family plan managers can cancel a plan, members can leave the plan at any time.
Learn more about Dropbox Family
Family members can opt out of the Family plan at any time. Once a member leaves the plan, they'll be downgraded to a free Dropbox Basic account and will lose access to the features and storage space of Dropbox Family.
Family members who leave a Family plan will retain all their files and folders in their individual account, plus any content that was shared with them. If they exceed the storage quota of their Basic account they can still access their files, but Dropbox will stop syncing files to their devices.
To leave a Family plan:
Note: If the Family plan manager cancels the plan, all family members will be converted to their own free Dropbox Basic accounts. Individuals can keep their Basic plan, or choose another plan that meets their needs.