GoodSync error - files over 100MB often fail to upload

I’m using GoodSync on a Mac to upload files to DreamObjects.

I have noticed that most files over 100MB fail to upload to DreamObjects. The GoodSync log reports:

Please note: I can open these files in their native application. Files are Adobe Illustrator EPS and Photoshop PSD files.

Please share any thoughts as to why I may be getting these failures.