Starting from V188.8.131.52, you are able to add folders in the Multi-instance manager of NoxPlayer.
Keep reading to find out how to add folders in multi-instance manager.
1/ Go to Multi-Drive by Clicking your desktop icon or the tab on the tool bar.
2/ Click the small folder-shaped icon to add a new folder
3/ Press, hold and drag an emulator instance to move it to the new folder. Please kindly note that in version 184.108.40.206 you cannot move multiple instances to a folder at once by selecting them all.
4/ You can also change the name of the folder, and collapse/expand it.
5/ You can launch all instances in the folder at once by clicking the [run] tab on the folder.
Also note: all emulator instances in the folder will be deleted after you delete the folder.