Micro SD/TF Card Class 10, 2GB to 64GB Flash Memory for Smartphones
2GB 4GB 8GB 16GB 32GB 64GB 128GB 256GB Storage Size. Micro TF Mini SD Card. 64GB ≈ about 58GB--60GB. 2GB ≈ about 1.5GB-1.86GB. This situation does not fall under the category of product quality issues.