Update/downgrad Huawei P30 Lite via deload methode

[HappyStrongMan]

Hi,
I wanna update my p30 lite mar-l21a 9.1.0.317 (c431e6r2p3), I got Huawei P30 Lite ( Dual ) MAR-LX1A MAR-L21 hw eea HLRCF Marie-L21A 10.0.0.167(C431E8R2P7) from androidhost.ru ,
I have dload filder wich content mar-l21a_hw_eea2 folder and update_sd_base.zip archive.
Can i put this dload folder on sd-card and perform Update?
Can i do the same methode for downgrad ?
Thanks & Best Regards