Home Slickdeals SanDisk Extreme 400GB microSD Card with Adapter. $49.99 Costco. Item: 4005050 Slickdeals SanDisk Extreme 400GB microSD Card with Adapter. $49.99 Costco. Item: 4005050 By ARCOM - 30 December 2021 61 0 SHARE Facebook Twitter Go to the deal page: SanDisk Extreme 400GB microSD Card with Adapter. $49.99 Costco. Item: 4005050