Oh, I think I can actually help you, in other words, I know a software called Samsung Data Recovery can help you. As the name you can heard, the software can recover data from Samsung device. But what you don't know is that it can help you backup and restore data from phone to computer. Do you very curious about it? During the following I will introduce how to backup/export data from Samsung Galaxy to computer by using this tool.
Steps to Backup/Export Your Data from Samsung Galaxy Phone to Computer
Steps 1. Connect the Samsung Galaxy to computer
There is no doubt that you should download, install and run the Samsung Data Recovery first. And then to meet your hope, you have to select "Data Backup & Restore" among all the toolkits.
After that please connect the Samsung Galaxy to the computer via USB. Be remember to allow the USB debugging on your phone's screen.
Steps 2. Choose file types to backup/export
If successfully, then you can see many kinds of data on the window, you can select the data you want to backup/export and click on "Backup".
The whole program may need some time, which depend on the data you backup/export, but any way, you should wait patiently. After the backup is completed, you can click on View the backup button to see what's in the backup file, and you can select whatever you want to sync to your computer.