When you choose Create Automatically, you can either choose to create folders automatically in the file attachment field's name or create separate folders dynamically for each form entry to store the files uploaded.
If you choose to create folders automatically based on field name,
Here is an illustration showing the folder structure in Google Drive:
icon and selecting the required fields from the list.

When you choose Manage Manually, you can manually map attachment fields to folders in Google Drive. You can choose to save such attachment files under My Drive or Shared with me.