This is calculation difference between manufacturer and your PC, please Google 'Memory card capacity' to get more information.
Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.
2.Speed Test
(1). The speed show on our link is test by Samsung or by our professional instrument, you'd better use 3.0 interface and 3.0 card reader, then you can get a nice speed.
(2). Speed is influenced by many different factors , interface, computer condition , test software ,systems ,use , etc .
(3). If you test a low speed by yourself, , please donot worry, you can try another instrument to test(need 3.0 interface and 3.0 card reader). And if you always get the same low speed, you can retrun the goods, then we refund you all money.
(4). We can 100% promise that our product are all 100% original, there is a security verification label on each package.
Package:
Memory Card * 1
Samsung MicroSD Adapter * 1
Brand Name:Samsung
Model Number:Memory card
Package:Yes
Type:TF / Micro SD Card
Read/Write Speed:C10 U3 4K HD
Type 1:Grade 10 microSDXC EVO+ micro sd card
Capacity:32GB 64GB 128GB 256GB 16GB 8GB others
48M U1 Speed:up to 48MB/S(Read), C10(Write)
Size:15*11*1mm
80M U1 Speed:up to 80MB/S(Read), up to 20MB/S(Write)
Certifications:FCC, CE, VCCI, NATA
100M U3 yellow Speed:up to 100MB/S(Read), up to 90MB/S(Write)