i have a roteur huawei model DG8245V and i need openwrt for it can some one help me plz i need it
That's unfortunate as it's not supported. And judging by Support for Huawei DN8245V-56 aka "DG8245V-10" - For Developers - OpenWrt Forum there's not much appetite for anyone to put in the work to add support.
So you really only have two options:
Use the device without OpenWRT, or
get a new device which is supported.
I need to change to openwrt because my internet provider provides it with limited capabilities and I do not have the money to buy another device
Can't I download a copy to another device?
No, you can't.
Best case scenario, put it in bridge mode, and install another router behind it.
Can you explain more I don't understand
Google "router bridge mode".
ah ok ok broo i geet it