“In store only. Customer upon recycling an eligible storage device will receive a 15% off coupon good towards an eligible WD or SanDisk storage device. Markdowns taken from current prices. Limit of 1 coupon per household, and coupon can only be used once. Recycled drive will not be returned under any circumstances. Not available in all locations and some stores may have additional limitations.”
Looks like one drive one coupon one time.