I explained all this to Acronis tech support and they sent me a new version of True Image

After numerous discussions with tech support (see below), they finally conceded that the only way to back up large files was to manually delete the previous backup and do a complete backup (no incremental backup), which is both time-consuming and error-prone

The user called the tech support line and got no help and solved it himself and posted the solution

After several conversations with multiple tech support staff, I determined Acronis had no intention of making it possible for US the CONSUMER make a decision whether we wanted TI be allowed to backup the OneDrive folders