MediaFire is a file hosting service that provides a solid online backup and file storage service. It also allows for a form of file sharing with a maximum of 2GB. It's a great option for storing and sharing large amounts of data.
iCloud is a media storage service developed by Apple Inc. Users can store files, photos, music, and video, to access them on other devices, like Apple TV, iPad, iPod, etc. iCloud comes with 5GB free storage, but can be upgraded to 50GB for $0.99/month, 200GB for $3.99/month, or 1TB for $9.99/month.
Google Drive is a document editing and sharing service. It is a part of Google's suite of web-based productivity tools, including Google Docs, Sheets, and Slides. Drive allows users to create and edit documents in a word processor-like application, and to save them in a Google Drive folder, where they can be edited from any computer.
Dropbox is a file hosting service operated by Dropbox, Inc., that offers cloud storage, file synchronization, and client software. Dropbox creates a special folder on the user's computer, which Dropbox then synchronizes so that it appears to be the same folder (with the same contents) regardless of which computer is used to view it.
Mega is a cloud storage service with a focus on security and privacy. It was originally created by Kim Dotcom, the founder of Megaupload.
Box is one of the more popular cloud storage services around, with 5 gigabytes of storage for free. It also has many of the same features as the other services, including an easy-to-use interface and collaborative features.