ETC Congo Family v6.4.0 - Manual (Page 837)

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Images
You can import images from a USB memory stick or a digital camera by connecting it to
Congo and selecting "Import Images.." from the Browser >Media >Import Images node.
NOTE
This works for cameras that show up as a new Drive in Windows (not
as a camera device).
Media Images - Delete
You can delete images directly from the Browser by pressing DELETE.