2012 to 2015 errors. Assets not in folder

[PaulBon]

I have just upgraded to 2015 from 2012. When I go to export as template I get errors that assets are no in the file location. Everything seems to work as designed. Are these assets on my server location and can they be brought down to the local drive. The "C" drive is the path location.

I also get a similar error when verifying the assets/

[antonsvideo]

you export to template from Nof12?
you export to template from Nof15?

[PaulBon]

I exported to template from 2012. Had to do selected pages. It gave me errors when I used entire site selection. Imported to 2015. Mad some changes in the look and feel. I am trying to export to template in 2015. That is where I get the errors. I am able to do the select pages export with errors, but it saves.

[antonsvideo]

first go to site settings and choose tools, re-optimize
then go to assert view and choose delete unused assets
then choose verify assets