Setting chunkcount for export actions

[cbak]

 I noticed that every time I save an export definition, the chunk-count definition is set to 1. However other files created earlier have their chunk-count set to 0. 

Is there a way to select the chunk-count definition when creating an export action? (small file, no need to chunk. And only files with chunkCount 0 or large files with actual chunks can be download with an API)

ex: 

export-info :
{'id': '116000000010',
   'name': '116000000010',
   'chunkCount': 1,
   'firstDataRow': 0,
   'headerRow': 0}

Thank you in advance for your help.