local and cloud file storage framework (part of Rails)

 Active Storage makes it simple to upload and reference files in cloud services
 like Amazon S3 and Microsoft Azure Storage, and attach those files to Active
 Records. Supports having one main service and mirrors in other services for
 redundancy. It also provides a disk service for testing or local deployments,
 but the focus is on cloud storage.
 .
 Files can be uploaded from the server to the cloud or directly from the client
 to the cloud.
 .
 Image files can furthermore be transformed using on-demand variants for
 quality, aspect ratio, size, or any other MiniMagick supported transformation.