Posting Pics from Samsung Galaxy S8

[Duffy Lover]

Hi Y'all! I'm just about to embark on a WDW trip, and I want to be able to update my trip report on the go from my phone. I really would like to add a photo, but not a file/thumbnail. When I write my trip reports I do them in Google, and then copy and paste them over and the photos transfer perfectly. How do I get a full size pic in a post from a phone?

Thanks!