Create a folder on android A3 2016 6.0.1 marshmallow

I want to create a folder on my samsung A3 When i search the web i find 2 things 1. Press the edit button on the right top of the screen and then drag amd drop an app on top of an other to create a folder. Not working . When pressing the edit button the only thing i can do is remove the apps or add new apps .all the apps have a minus sign on them . 2. Press and hold on an app and then choose "create folder" choice that appears after holding the app. Not working . When press and hold on the app nothing happens. Any suggestions ?