  We studied $ab$-plane transport properties in single crystals of the
superconductor $\beta$-FeSe up to 16 T. In the normal state, below 90 K, the
crystals present a strongly anisotropic positive magnetoresistance that becomes
negligible above that temperature. In the superconducting state (T$_c$=8.87(5)
K) the upper critical field anisotropy $H$$_{c2}$$\parallel$$ab$ /
$H$$_{c2}$$\parallel$$c$ changes with temperature and the angular dependence of
the dissipation for fixed temperatures and fields reflects a strongly
anisotropic behavior. Our results make evident that multiband effects are
needed to describe the measured transport properties. We model the
magnetoresistance and upper critical field behavior with a two-band model
showing that the diffusivities ratio parameter remains unchanged going from the
normal to the superconducting state.
