Cloud data storage poses various risks, including data breaches, where sensitive information may be accessed by unauthorized users. Additionally, there is the possibility of data loss due to service outages or hardware failures at the provider's end. Users also face vendor lock-in, complicating migration to different services. Regulatory compliance concerns may arise, especially with personal data, making it challenging to meet legal requirements. Lastly, insufficient security measures implemented by the cloud provider can expose stored data to threats.