Creating 55 new jobs, the new 15,647 sq ft store at Cortonwood retail park opened yesterday.
The first 500 customers through the doors were given a £10 gift card to spend.
Cortonwood store manager Angie Hoyle said: "We are very excited to be opening up the new store and bringing Barnsley's shoppers big savings on all their favourite brands."
The new shop is in Unit 2 at Cortonwood retail park.
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