GeoTiff (Rapid Eye image)

Hello QGis"ler",

I want to classify a RapidEye Mosaik image. The Rapid Eye File is one Image
with five channels. I think, for classify with the Semi-Automatic
Classification Plugin I have to split every channel in a separate Band / Tif
file. So I can load it in the Band set definition.
Is this the right approach and how I can split a more banded Tiff Image?

Thanks for helping.