Note: You can share your gDrive with a non-google email securely IF that user has a google “account” See Instructions: https://www.marypainterdoss.com/uncategorized/create-a-google-account-with-your-business-email/
Login to Gmail
Click on the block of dots next to your profile picture in the top right
Then click gDrive
Under “My Drive” choose the folder you want to share, or create one.
Right click on the folder and click share
Enter the email address of the gmail user OR business email if they have a google account
Choose how much access they have Editor (full access), Commenter (limited access), Viewer (they can only view the files)
Add a message if you desire
Click Send
Anything you put into that folder (or the folders below) that person will have access to if they login into their google account and click gDrive and “shared with me”