Kct1975, thank you for your reply, but that's not the problem, my gallery is synced to google pics, I wanted somehow to share from Google pics (the album) back to gallery, I've actually downloaded each pic, which sends it back to gallery, so I guess problem solved.
But I thought there would be a simpler way, as I said I coudnt understand why when I went to share album from Google pics to Samsung gallery, the Samsung gallery wasn't in the list to transfer to, but other Samsung apps were, I though there may be a way to add it.
I went to print pics on a Kodak machine, but it would only recognise my gallery pics, but the album I wanted to print was in Google pics, seems simple just to send album back to gallery, but apparently not.
Cheers