The camera snaps a 19 MP (if using 4:3) or a 16 MP (if using 16:9) DNG file. This is a RAW image file that ranges any where from 18-25mb. From that DNG file, it creates a 5 MP JPG file that is usually around 1-2mb.
Most PCs (or MACs) are not pre-configured to be able to view RAW images, like DNG. Skydrive (AKA OneDrive) and other clouds services are also not designed to view DNG files. Also, the bandwidth to upload multiple DNG's would be rather large and slow. There might be times I wish to directly upload a DNG to Skydrive, but for the most part people are not going to want to do that, especially with multiple photos. The 5 MP JPG is to make working with these hi-resolution photos manageable on a day to day basis. That 5 MP JPG created from the RAW image is still a reasonably decent quality image.
I would imagine that over time, we will see more apps that let you work with the high resolution photos.
*Edit: I found in a couple of other threads that Pocket File Manager gives you access and you can export it using multiple methods.
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