Amazon Drive is a online cloud backup service offered by Amazon to store your photos, files, videos etc. You can back up your photos and files to cloud and you can access them from your computer, phone, or your tablet using Amazon Drive app.
First 5 GB storage is free, but if you want more storage you have to pay.
Many IT organizations are beginning to consider cloud-based cloud storage and backups to eliminate costs and maintenance of hardware.
Amazon S3 being used by enterprises of all sizes which is designed to make web-scale computing easier and to store, retrieve any amount of data, while Amazon Cloud Drive is a consumer front-end service to Amazon’s S3 to store their personal files like music, videos, photos, and documents online.