Apple, Microsoft and Amazon have agreed to give cloud storage subscribers fairer contracts after intervention by the U.K.'s Competition and Markets Authority.
Such cloud storage services are typically used to store photos, videos, music or digital copies of important documents.
If the services shut down or vary their capacity or prices without notice, customers can lose their data, or be held hostage.
The CMA asked the storage service providers to give adequate notice before closing, suspending or changing services, and to allow customers to cancel their contracts and receive a pro-rata refund if they didn't accept service changes.
The regulator last year obtained similar undertakings from Google, Dropbox and five other cloud storage providers.