Amazon Simple Storage Service is a cloud-computing application that allows users to rent Amazon’s servers instead of purchasing their own. It is an cloud object storage service that offers industry-leading scalability, data availability, security, and performance. Particularly, it helps users save time, as Amazon will take care of the secuirty, upgrades, and other maintenance issues. 

Key features:

• Storage management and monitoring
• Storage classes, access management and security
• Data transfer

12 months free of usage with 5GB of standard of storage. For detailed pricing plans, see here.