The Delkin 128GB Secure Digital Class 10 memory card is designed to be fast and reliable for shooting situations when you need to store a lot of information on a single memory card. Due to it"s high capacity, it"s a great card choice for video storage, as a single 128GB memory card will store up to 16 hours of HD video or over 40 hours of standard video. This card promises write speeds up to 20MB/s and read speeds up to 40MB/s, and is rated at a 266X overall transfer speed. Backed by a Manufacturer"s Limited Lifetime Warranty.