Object storage is a way to keep files as separate items, often in an online service. Each item, such as a photo or document, is stored with information that helps the service find it again. Apps can save files there and retrieve them when needed.
Imagine a large storage room where each package has its own label. Cloud services such as Amazon S3 use this approach for many kinds of files. Object storage is useful for large collections of images, videos, and backups, but it is different from the folders on your own computer.