In February 2008, Best Buy opened its first store in San Juan, Puerto Rico. Best Buy's Geek Squad market tests in Office Depot and FedEx Kinkos stores ended by March. Also in March, the company began promoting the Blu-ray optical-disc format over the HD DVD format, a move which ultimately contributed to Toshiba's decision to drop HD DVD. In May, the company agreed to buy 50% of the retail division of The Carphone Warehouse, a London, England-based mobile phone retailer. The deal was worth $2.1 billion.