One thing that Family Tree Maker (FTM) does with the sync feature to Ancestry.com that may not be obvious to new users. FTM will save the source image documents for census records, marriage, death, etc *IF* there is an image file available. You don't have to save the image specifically yourself.
There is an option to turn this off for those who don't want all those images.
Of course, it will save/download/sync those images that you supply yourself.
There are some tutorial videos available to see how it works - these are for the older version so may not be exactly the way the upcoming 2014 version works: http://genealogytools.com/family-tree-maker-tutorials/ http://www.familytreemaker.com/Learn