The 64GB SxS-1 (G1C) Memory Card from Sony is designed for stable and reliable capture of high frame rate 4K video content. Achieving enhanced read and write speeds, this memory card is suitable for use with Sony's large sensor 4K camera technologies, giving content creators more flexibility and creative options for 4K, 2K, or HD acquisition and production. This SxS-1 memory card features a PCI ExpressCard 34 form factor and can achieve a fast maximum read speed of up to 440 MB/s and write speed of up to 200 MB/s. Additionally, The SxS memory card can use the industry-standard PCIe platform as an interface to realize higher transfer speeds up to 8 Gb/s (1000 MB/s). The Sony SxS card offers wear-leveling (data-defect minimizing function) and data refreshing capabilities and are subjected to a series of strict quality assurance tests, including checks on recording blocks, temperature cycles, and operating environment. In addition to its enhanced frame rate capture capability, this SxS memory cards offer improved reliability and data-error correction. Additionally, you benefit from the data-defect minimizing function for secure data recording and a "power failure management" function for re-creating video clips in case of sudden power loss or accidental card ejection during recording. Its high-reliability is continuously verified through strict inspections and various tests throughout the manufacturing process. In the event of data loss or other incidents, users can retrieve contact information for Sony technical support through a QR (quick response) code embedded onto the cards.