How to create a batch/ .bat file?

not sure what to tell you at this point. not really a rclone problem.
how many GB of media files do you have in the gdrive?

something other than rclone is requesting those files; you need to figure that out.
try playing the file from mpv, do not use windows explorer.
check settings in mpv, try vlc

you can use a program named process explorer to figure out what is requesting those files.

windows explorer is always a problem.
i have not used it in 10+ years, there are many alternatives.
if you choose to use it, then you should read this