Hi,
i am a new freelancer here, but with solid experience with Shopify and the csv format they are using. I had a Shopify store for about a year, and used the csv import/export function quite often, so i am familiar with it.
If you hire me, i can get this job done in a week! (i have just finished an opencart store redesign yesterday, currently looking for new jobs)
Kind regards,
Zombor Török (Budapest, Hungary)