Useful ideas for working with SharePoint and MS files

For saving any MS file directly into our SharePoint site, please refer this URL : https://support.office.com/en-us/article/Save-a-file-to-a-SharePoint-library-32204d9f-55ea-4232-a32b-aa7e046afcdd#__toc251675678

For saving files in your email attachments directly into your document library, we need to configure : https://us.flow.microsoft.com/en-us/galleries/public/templates/f7a46809e53c42108034e56acf83bb79/save-my-email-attachments-to-a-sharepoint-document-library/