My understanding of cloud storage

The simplest is the Web: DropBox, Google Drive, etc.

The second is a stable form of networked storage: Evernote,instagram is a plethora of professional software that is mostly stored and shared
The simplest cloud computing service: Google Docs, which provides both storage and editing capabilities (where edits are actually calculations)
IaaS's understanding of cloud storage: the provision of basic elastic computing services
SaaS understanding of cloud storage: A variety of files in almost every format can be a single SaaS
Amazon's resilient Computing Cloud (Elastic Compute Cloud, EC2)
Peer is also a cloud storage
Adobe CC is also a cloud storage
ICloud: From charged mobile me into a free service to enhance user stickiness: Sync information from different devices, including contacts, calendars, documents, photos, music and books
EverNote: Automated sorting, Instant Search, helps users remember everything they think about, see, and experience, including business cards, airline tickets, verification codes, hotel bills, things to buy or give to others, memory records, travel planning and more, page extracts, trademark barcodes and more. Search by keyword, title, tag, geographic location.
Cloud Camera: Automatically upload photos to the fast disk

NFS Distributed File System
Googlefs, wait.

115: Stable, flexible sharing, strong social function, open third-party application development
Jinshan Express: Provide synchronized backup files faster, cross-platform, Cloud album browsing flowing
Sina: Rely on Sina Weibo popularity, popular sharing to attract users to share documents enthusiasm
DropBox: Upload download fast, sync Backup, support common format online view, multi-platform support, batch upload, multi-version support, viral marketing (Invite friends, and there are three ways), SDK open (account bundle)

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Myself: You can start with a SaaS. Writing a book is the stupidest thing to waste time.

In addition, data consistency, redundancy, destruction, and so on, can be considered to provide a unique service
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Jinshan profits from the cooperation with third-party applications

My understanding of cloud storage