Unable to install OS 11 Update via the phone

I managed to download the below update from the XDA site for my GM1920 One Plus 7 Pro (Europe model I think)


When I go to try and do a local system upgrade via the phone I don’t see the file.

To confirm

I have NOT unzipped the file

I have placed it in the root of the phone. By that I mean it’s NOT in a directory but at the lowest level on the phones storage.

My phone is NOT rooted.

Can I put this on a USB and try the…

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Source: XDA