You don’t need an operating system to run Acronis. You need a USB stick.

Storing your bootable ISO on Google Drive allows you to download and burn it from any healthy machine if your primary PC fails.

A genuine file typically has these identifiers:

I cannot directly create or host files like an ISO on Google Drive, but I can give you to obtain and prepare a bootable Acronis True Image 2021 ISO and put it on Google Drive yourself.