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Why Speed Class and UHS Speed Class?
Different type of flash memory varies from speed and their transfer rate. A common example is video recording, which is inefficiently unreliable and requires a consistent writing speed in order to reach the best quality of work. However, an effortless way to tackle the problem is to switch to Speed Class or even better UHS Speed Class. By doing this, it minimizes the writing operation and therefore provides a minimal and regular speed for video recorders and other record streaming contents such as camcorders.
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Fragmentation and Speed
The speed of the SD card can have an effect on the fragmentation of the card. When the device writes information on to the card and free memory gets split up into smaller quantities, this might result in the rising scale of fragmented and non-linear storage. To diminish the total fragmentation, speedier SD card can help make reparation.
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Marks |
Operable Under... |
Applications |
SD Memory Card |
Speed Class |

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Normal Bus l/F |
SD video recording |
SD, micro SD, SDHC, microSDHC, SDXCm, microSDXC |
 
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HD ~ Fu HD video recording |
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High Speed Bus l/F |
Full HD video recording, HD still consecutive recording |
UHS Speed Class |

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UHS-I Bus I/F |
Full higher potential of recording real-time broadcasts and capturing large-size HD videos. |
SDHC UHS-I and SDXC UHS-I |
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