When in aperture the file size of a picture is 4.68mb, and when i drag the photo to a file on my desktop, the file size goes down to 268kb!! Can someone tell me why this is happening?
The larger file size is the original master file held in Aperture, when you drag to the desktop you are dragging a version of it (using your default export version preset e.g. 800x600 jpg). Hence the smaller file.