I need to insert a picture into an SMS or MMS text. When doing so it directs me to the gallery, great! but the pic that I want is not in the gallery it's in Google Drive or Dropbox. From the native app I cannot attach this pic. So, I need to download this pic into the gallery. How do I do this? Also, I thought it would be easy enough to just email the pic to me and then download it to my phone. this did not work either. When trying to do this, attached file was in my yahoo mail as an attachment; I clicked attachment and the phone dialog box open indicating open with gallery. I click on that and the pic opens, great! But from the opened pic I cannot insert into a text message and this picture was not saved on my phone. I checked to "downloads" and it was not there.  Any ideas?

Thanks