Exclamation [problem] Move apps to SD

Hi. After installing app from playstore, i try to move the app from internal storage to SD card through app manager in Settings.

The thing is, i notice that the space in SD card remains the same even after moving the app to SD card.

When I delete an app which has been moved to SD card, the space is freed up in internal memory.

Is this what is happening with all others too? Let me know. I could not install a few apps coz of memory limitations of just 4 GB ROM. Move to SD card is not helping me at all. Thank you.