Time evolution of mass accretion rates measured at the event horizon (top) and the normalized magnetic flux at the horizon (bottom). Panels (a) and (c): Case with smaller magnetic loops (λ = 40). Panels (b) and (d): Case with larger magnetic loops (λ = 80). The curves in different colors correspond to the different radiative cooling and time-averaged accretion rates: radiative cooling with Ṁ/Ṁ_Edd = 1 × 10⁻³ (blue and green), radiative cooling with 1 × 10⁻⁵(black and light blue), and no cooling (red and light red). In panel (c), the horizontal red and blue lines denote the average magnetic flux of models A and C, respectively. The blue vertical lines in panels (a) and (c) mark the onset of the quasi-steady state. In panels (b) and (d), the light blue and light red vertical lines indicate the transition from SANE to MAD for models E and F, respectively. The time is given in units of the light crossing time, t_g ≡ GM/c³ = [M].