PD:17 Unable import BootCamp into PD VM.

dear all, can any help me on this problem.
I tried to import Bootcamp to my virtual machine, and the import assistant prompts me that there is not enough disk space. It needs 136GB and I only have 99GB, but 480GB is available in the storage space management.
I'm using Chinese language version, Red line means: not enough disk space ,required 136.68GB, available 99.88GB. About this Mac shows I have 480.62GB available (Total 700GB).