Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. You’ll never neend to email yourself a file again!
Your files, anywhere
Any file you save to Dropbox also instantly saves to your computers, phones, and the Dropbox website.
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2GB of Dropbox for free, with subscriptions up to 100GB available. -
Your files are always available from the secure Dropbox website.
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Works even when offline. You always have your files, whether or not you have a connection.
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Dropbox transfers just the parts of a file that change (not the whole thing).
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Manually set bandwidth limits — Dropbox won’t hog your connection.
Simple sharing
Shared folders allow people to work together on the same projects and documents.
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Invite friends, family or teammates to a folder. It’ll be as if you saved the folder to their computers. -
See other people’s changes instantly.
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Create photo galleries viewable by anyone you choose.
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Send a link to any file in your Dropbox using your Public folder.
Dropbox mobile
Apps for iPhone, iPad, Android, and BlackBerry keep your Dropbox at hand, even on the go.
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Bring your files with you when you’re on the go.
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Edit files in your Dropbox from your phone.
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Easily upload your photos and videos to Dropbox.
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Share freely with family and friends.
Your stuff is safe
Dropbox protects your files without you needing to think about it.
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Dropbox keeps a one-month history of your work. -
Any changes can be undone, and files can be undeleted.
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Secure Sockets Layer (SSL) and AES-256 bit encryption.
With Dropbox, your files always be synchronized and it’s all automatic. Dropbox is a perfect alternation for attaching file in your email, using USB to transfer file to another device, more and so more.
All on that, it provide you 2Gb free space and registered easily. You can register free here
and download the tiny supporting software for Windows in this link. You should install this tool to get all feature of Dropbox. Have fun 
