1. To add a folder in OneDrive locate "New" and select "Folder"

Arrow pointing to menu "New"

2. Title your folder and open your folder

Message box "Create Folder"

3. Locate the file you would like to upload from your local PC to OneDrive and drag it to the desired location in OneDrive. You can also choose Upload and navigate to the location of the file. 

Arrow showing drag & drop file

Find out more on how to: