This data recovery mode lets you recover not only existing data in the backup, but also those data deleted from your device before you made the backup, as long as they were not overwritten. As I know, you can use an iPhone Backup Extractor to backup your iPhone  files easily on your Mac.

Most people would expect that the text messages should be placed in the
SD memory card, but the fact is that only the multi-media files would be
saved in the external SD card and the text messages will be stored in
the internal storage. You can easily transfer data from a cell phone SD
card … Read more