Hi @TandelGouravi - I have created a workflow, which saves as all XLSBs to XLSCs without worrying what's inside. This is similar as if you'd open all your XLSBs in Excel and "Save as..." them.
In order to run this workflow you need:
1) Connect your Directory tool to the right folder
2) Check location of the "excelcnv.exe" file on your laptop and change it in the formula tool, if needed.
Is that something that you wanted?