How to Add Attachment to Email for Guest

Sorry to ask but is there an attachment link where I can upload a file for our guest to see?
I couldn't find one on the email I was trying to send our guest after they booked directly thru Owner Rez.

I do the following. Create a file on Google drive and make is shareable. get a link. Put a link into your email template. guest click on the link, file opens, they can view and /or print it

Thank you for this help.
So I am not able to click a little paperclip icon and add something from my computer?

I do not know, never tried

Not yet, but we're working on it.

You can also upload files into your OwnerRez account and then link from there: https://www.ownerrez.com/support/articles/files-email-templates