Has SGPro ever worked reliably with your Macbook [Pro?], Bootcamp(!!) with Win10 (I assume Win10 32 bit??), that portable hard disk, and this camera?
If it never has worked reliably in this setup, the trouble shooting would be a different approach than if it had worked in the past.
If you have the time for another test, open the Windows Task Manager where you can see all processes and their claimed resources. While the camera is in action, have a look at what happens to the memory usage of the SGPro process and note down any change, increase and decrease in memory usage. Does memory go sky high after a few images? Sky high as in higher than 600MB and then throws the error?
If it does, have a read
here. Maybe Chris' work around works for you, too. Or at least, you can verify that you experience the same issue and can add that info to your own forum thread.
All your info in your replies here are vital information on the SGPro forum for the developer or users who would want to help you. I'm intrigued but flying blind, sorry.