Right click on that folder and select upload(or press Ctrl+ Shift+ O). Then you can navigate to folder which you want to push your file in it. Quick search window will appear, then type Device File in it and Device File Explorer will appear in search result and you can click it.
If you could not find its icon, inside Android Studio press shift button twice.By clicking on Device File Explorer icon in right bottom corner of android studio window.Android studio have new tool called Device File Explorer.
