Free download the Android Data Recovery and try to get your Samsung Galaxy S7 lost data back:
Easy Steps to Recover Deleted Data from Samsung Galaxy S7/S7 Edge
Step 1. Connect your Samsung Galaxy S7 to computer
Install and run Android Data Recovery and connect your Samsung Galaxy S7 to the computer with USB cable. Then click "Start" button to make the software recognize and connect your device.
NOTE: As the software can only access the rooted Android device, you need to make sure that your phone has been rooted before recovery.
Step 2. Scan Samsung Galaxy S7 to find the deleted data
After connecting your phone, the software will quickly scan the device to find all the existing and lost data. You can easily find the lost files you want by choosing the correct file types.
Step 3. Preview and Retrieve Data from Samsung Galaxy S7
Preview all the recoverable files one by one and then you can select out those you want quickly. "Only displayed deleted items"option to list the deleted files only. Finally, you can click "Recover" button to get the selected files back once.
Free download the Android data recovery: