Always 100% Genuine Transcend products! This extra large 256GB capacity memory card is supplied brand new in sealed retail packaging complete with a useful MicroSD to full size SD card adapter and a manufacturers 5 Year warranty. Use the memory card adapter for using your extra small MicroSD card in a regular SD slot (digital cameras etc.) or a card reader or laptop slot etc. Want to save space on your mobile device by running apps from a memory card? Transcend’s MicroSDXC/SDHC 300S cards are the right choice! Compliant with the latest speed class, the cards boast excellent random read/write speed, perfect for retrieving small pieces of data from random locations and speeding app launch time.A good fit for mobile app storageIt’s common for users to install and run mobile apps from MicroSD cards in order to free device memory. Random read/write performance is thus crucial. Transcend’s microSDXC/SDHC 300S memory cards are a great fit for storing mobile apps.Introducing Application Performance ClassThe Application Performance Class was introduced to adapt this new trend. Transcend’s microSDXC/SDHC 300S memory cards meet the new A1 standards, delivering minimum random read of 1,500 IOPS and random write of 500 IOPS, and sustained sequential speeds of at least 10MB/sShow the transfer capabilitiesTranscend’s microSDXC/SDHC 300S memory cards meet both the UHS Speed Class 3 (U3) and the UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recordings, with read/write speeds of up to 95MB/s and 45MB/s respectively.With a purchase of Transcend’s microSDXC Class 10 UHS-I memory cards, you can download the exclusive RecoveRx software for free. This user-friendly application allows you to conduct an in-depth search within your storage device for traces of erased files to be recovered.Built for extremesTo deliver the best performance and stability, Transcend’s MicroSD memory cards are tested to withstand extreme conditions.Waterproof: meet JIS IPX7 standards that can withstand immersion in 1 meter of water for up to 30 minutes.Temperature proof: perform in temperature extremes from -25°C to 85°C.Static proof: meet EMC IEC61000-4-2 standards and withstand static electricity.X-ray proof: meet the ISO7816-1 standard and are immune to airport X-rays.Shock proof: provide excellent shock, vibration, bending and twisting resistance.Specifications Card type: Micro SDXC Capacity: 256GB* Read transfer rate: Up to 95MB/s Write transfer rate: Up to 45MB/s *Some capacity is used for formatting & other functions. 1GB = 1,000,000,000 bytes. Some operating systems measure GB differently, so capacity may appear less. . Speed may vary with operating conditions.