According to your description, I created a simple flow to test this issue. The Winrar files on OneDrive are all below 10 MB, all the files can be saved from OneDrive to OneDrive for Business without issues.
According to your description, I created a simple flow to test this issue. The Winrar files on OneDrive are all below 10 MB, all the files can be saved from OneDrive to OneDrive for Business without issues.