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On the actual capacity
16GB = about 14GB-15GB
32GB = large about 28GB-30GB
64GB = about 58GB-60GB
128GB = large about 119GB-120GB
This is the calculation difference between the manufacturer and your PC, please "Google memory effect card capacity" for more information.
Your computer says 1 GB = 0.107374 billion bytes, where the market defines 1 GB = 1 billion bytes.

Gradually increase the capacity and speed of the memory card
(1). Use a high-quality USB 3.0 card reader to check all memory cards through H2testw on your PC.
The real memory card must pass H2testw correctly.
(2). Please do not use a cheap card reader to test the Micro SD card, the speed of the Micro SD card will be reduced
Low-quality of the reader.
(3). The speed of Micro SD memory card to great extent affected by the card reader and the capacity you choose,
USB port, etc. Low-quality equipment will reduce the card speed by 100%, I .e. 1MB = 1000KB.

Package content:
1x memory card

Tips:
⭐Please refer to the actual product
⭐Due to manual measurement, please allow an error of 1-3cm