How To Galaxy S9/S9+: How Do I Backup My Device Data On External Storage?

en, on Apps screen tap Settings.

To connect USB memory card or external HDD, plug the USB connector (USB Type-C) to the USB power adaptor and plug the USB memory/external HDD into an electric socket.

1-Then, on Apps screen tap Settings.

2Tap Cloud and accounts.

3Tap Smart Switch.

4External storage transfer.

5Tap BACK UP.

Select contents to backup and activate back up.

If data backup is completed, you can check the data My Files > SD card > Smart Switch Backup folder.