You didn't mention what steps you actually took, so this is only a guess.

Presumably you are installing from a download, by running the setup program?
If so, you should be able to nominate what drives you want everything installed to, something similar to this:

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BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.