Space management of the system volume
You can run migration jobs and list migrations on the Windows™ system volume. Do not configure threshold migration on the Windows system volume.
Attention: In threshold migration, files are migrated
based on age and size. You cannot ensure that critical system files
are not migrated. If you configure threshold migration on the system
volume, it is possible that some critical files will be migrated.
It is possible that the computer will become unusable or will not
start.
If you run migration jobs or list migrations on the system volume, do not migrate critical system files.