SD vs. microSD: Form Factor Differences
The main differences between full-size SD and microSD cards are capacity, the write-protect switch and price.
How microSD differs from SD
- Capacity: the microSD form factor has a lower maximum capacity.
- Write protection: microSD cards do not have a write-protect switch.
- Price: the smaller format is currently generally more expensive.
Technical specifications
Wikipedia describes the technical specifications of both sizes, as well as most other memory card formats, in detail.
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