https://www.dropbox.com/help/syncing-uploads/upload-entire-file https://www.dropbox.com/help/syncing-uploads/upload-entire-f... This should save some bandwidth

https://www.dropbox.com/help/syncing-uploads/upload-entire-file https://www.dropbox.com/help/syncing-uploads/upload-entire-f... This should save some bandwidth at the expense of CPU time.