This is the first stage where you transcribe recorded interviews and verify the accuracy of your transcription.
If you are working with interview transcripts, listen to the audio files, and check if the opinions/discussions of your interviewees are well transcribed.
Note your first impression of the data by highlighting phrases or sentences that are distinct.
Note ideas, recurrent phrases, and/or use a mind mapping tool (e.g., XMind) to map out your first impression of the data.