About Capacity:
400GB = 385GB-390GB
128GB = approx 116GB-120GB
256GB = approx 228GB-236GB
512GB = 478GB-492GB
This is the difference between the manufacturer and our PC. For more information, please see Google "Memory Card Capacity".
Protection:
Waterproof temperature proof shockproof X-ray radiation proof
Warm Tips:
1. We offer 100% genuine memory card with 5 year warranty
2. Use high quality card reader to check all memory cards on your PC.
3. Do not use cheap card readers to test memory cards. Memory card speeds decreased by lower quality card readers.
4. Memory card speed is greatly affected by card readers, adapters, USB ports and so on. With lower quality devices, cards will be 100% slower
5. If you have any questions or complaints with the product, please contact us directly from Amazon. We will give you a satisfactory answer! Thank you for visiting!