How to setup simultaneous multiple backups for Windows host ?

We have a host with 10 file systems each with around 150 GB backup data (total around 1.3 TB). The backup takes around 36-38 hours. As such, I was looking at splitting the backup to 3 simultaneous streams so that it can complete in 12 hours or so. Is there any way to do this ? I know there are other options (such as not to backup all drives on daily basis, but am currently not looking at that option). Reason for taking so long time for backup is that there are many changes happening on the server applications and the directory structure is too deep. Server team is looking at that but it will take long time. So, was looking at running 3 simultaneous streams on same host.

Thanks.