iCloud Drive

Organize cloud-based files however you want and sync across multiple devices including Windows. Drag and drop documents directly into an iCloud folder that syncs with all of the devices associated with the same Apple ID. Work on a document on one device and then open and make changes on another device without losing any work. Folders and tags are preserved during the synchronization process. One downside is that you currently cannot decide which files inside the iCloud Drive are synched automatically. iCloud Drive will sync everything stored on it between all associated computers and devices.

iCloud Drive is visible in the Favorites sidebar in a Finder window.

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This should feel familiar to users of Google Drive, Dropbox, or OneDrive.

As of mid September 2014 iCloud storage costs (http://support.apple.com/kb/HT5879) are: 5GB is free, 20GB is $0.99/month, 200GB is $3.99/month, 500GB is $9.99/month, and 1TB is $19.99/month.