Try to assign brand to one product and export this product only to check required format
It looks like you're missing the feature id.
Thanks The Tool, but your method does not work and i really cannot see how this can be done.
Is your "Brands" feature id "1"? If not then add the appropriate feature id number.
I use this on a daily basis so I know it works. You just need to make sure everything is exact.
Edit: Also the field name is supposed to be "Features" and not "Feature" and make sure the feature name is "Brands" and not "Brand".
If all else fails, do like ecom said and manually add the brand to one product then export it to see the exact format.
Thank you very much The Tool, I finally got it to work. I will be sure to ask you for more help :confused: when needed 8)