Question: how to move apps to sd card on galaxy s9?
Answer: Step 1: In order to move an app, launch Settings and navigate to the Apps menu. ... 
Step 2: Tap on Storage followed by Change.
Step 3: Select SD card (select Device memory if moving app back from SD card)
Step 4: Sit back and relax as it's going to take a moment for the app and its data to be exported to the microSD card.