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Microsoft has again announced the SkyDrive Smart file mechanism in Windows 8.1 – By default download only basic information and thumbnails of SkyDrive files, rather than actual files. Microsoft said that most of the use of smart files, SkyDrive on the local hard disk in the storage space than originally reduced by 80%, of course, users can also choose to use the entire SkyDrive offline ...
For Windows 8.1 and Windows Phone users, if you upload a photo to the SkyDrive native photo album, SkyDrive automatically extracts the text in the photo, OCR (optical character recognition) feature. Recently, Microsoft has announced that Windows 8.1 's Bing Smart search will identify these words and integrate them into the system search results, regardless of whether the photo is stored locally.
There is also a new Windows 8.1 built-in SkyDrive promo: