Google Help for Drive Search: https://support.google.com/docs/answer/2375114?hl=en
Recommended Short Video: https://youtu.be/NpwZW2aD4Y4
 
Google Help for the left-hand side navigation: https://support.google.com/drive/answer/2375046?hl=en
Recommended Short Video for organization: https://youtu.be/0pdda2TS0M0
​