First decide how you would like to work:
1. Shoot in HD and work in Avid in HD | link for how to do that |
2. Shoot in 4K, transcode and work in Avid | link for how to do that |
3. Shoot in 4K and edit native files in Premiere | link for how to do that |
4. Shoot in 4K, transcode and work in Premiere | link for how to do that |