Share by Email (Folder)
If someone doesn't have an account, they can access a folder
Once an account has been created the folder will shows in the "shared with me" section of files tab.
Share by Email (Files)
If someone doesn't have an account, they can access a file
Single file/multiple file share does not show in the "shared with me" of files tab, they will need to reference the email
Open Share/Copy Link (Folder/Files)
If someone doesn't have an account, they can access a folder or files
Open share links will not appear in the "shared with me" section of files tab, they will need to reference the link