Unity version: 5.3.4f1 (64 bit).
I have Android studio installed on the same PC and used the Android SDK manager in that to install the SDK and NDK (amongst other things), with the NDK sitting in the folder c:\users\AppData\Local\Android\sdk
dk-bundle
When I try and set up the paths for android in Unity Edit>Preferences>External Tools it allows the sdk path fine, but when I put in the above path for the NDK I just get the message “Unable to detect NDK version, please pick a different folder”.