Google launched a new tool named Google Takeout. This allows Google users to download a copy of their data stored within Google products.
This tool allows backup from these services now :
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Buzz
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Contacts and Circles
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Picasa Web Albums
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Profile
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Stream
Finally you can download a zip file with your personal data.
Go to and backup: https://www.google.com/takeout/
You have to care about your downloaded data yourself.
