From Detail screen click on the image you want to save.
Image will be shown after click. Now in order to save or share it, press on the share button. You will be able then to save the image to your Files or to share it with other Apps
In order to save images to Photos, you need to long-press on the Photo, by that option to save to photos will appear
Save Videos, Audios, and Files
From Detail screen click on the link you want to save
Video, Audio, or File will be shown after click. Now in order to save or share it, press on the share button. You will be able then to save it to your Files or to share it with other Apps