Capacity 64 GB maximum read speed 90 MB/s, maximum write speed 30 MB/s 4K videos, perfect for storing smartphone and tablet apps. Depending on the device and format, it may only be recognized up to 32 GB. Please check compatibility with your device. If used in constant load conditions such as a drive camera or surveillance camera may shorten the product life and may not be covered by the warranty. Please be aware that there is no guarantee on the loss of recorded data.