To share a recording you must:
Click on one of the 'Plus' buttons
Open the app Menu by clicking on the three bars
Select 'My Mixes'
Click on the three dots next to your mix
You can either share your mix as an mp3 file by clicking on 'Share mp3', or share your mix as a link by clicking on 'Share link' so that people can listen to your mix online.
You can find your mixes in .wav format in the 'Edjingrecords' section that you will find in the Music folder of your device.
Once you have found your mix, click and hold on it and choose 'share'. Then, your device will propose you different way to share it.
Click on the channel you want and follow the instructions displayed.