Launched in 2008, SanDisk held this area of the market with their microSD preloaded music cards. As of 2012, the product lines were cancelled. The only place to buy this product is from warehouse websites or individuals selling online.
As of 2015, many of the preloaded music cards for SanDisk's slotRadio and slotMusic programs are no longer for sale at larger retail stores. Websites such as Amazon.com and Overstock.com offer a selection of cards and playing devices at discounted prices but with no warranty available. Individuals on websites like eBay.com also are selling their personal collection of cards and players.