Android : Android Development - not able to recognise my Samsung s4 mini - unauthorized

Thank you for taking the time to read this

I'm attempting to create an Android app for the first time and I thought it would be best to use my personal mobile rather than the emulator provided in the Development tool. When I try to connect to my phone to run my build my phone isn't recognised.

I've read a number of forums and I've updated my drivers, installed Kies, accessed the Developer options and put my phone in debugging mode but it's still not being recognised.

The message shows my phone in a State of Unauthorized and Compatible "No, minSdk(API 19)>deviceSdk(API 1). My phone is Android version 4.4.2, higher than the minimum pack I set when creating the project.

Thanks in advance for any possible solutions