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SD cards are memory storage devices. These can be found in many devices such as Mobile phones, digital cameras, flash drives and many other devices.
SD cards have different speed rating and classes
Speed classes are 10, 6, 4, and 2.
is the fastest, is the slowest.
class 2 (minimum write speed of 2MB/s)
Class 4 (minimum write speed 4MB/s)
Class 6 (minimum write speed 6MB/s)
Class 10 (minimum write speed 10MB/s)
SD Cards can also have Speed Class
Speed Class and the UHS Speed Class are not compatible
UHS Speed Class is available on SDXC and SDHC memory cards and devices.
SD= up to 2GB
HC= High Capacity 4GB – 32GB
XC= Extended Capacity 32GB - 2TB
UHS Speed Classes
10MB/s
30MB/s
SD memory cards and USB sticks can become faulty and give you many problems. Windows has some generic tests you can use. The video below will show you how to check windows file system. Also a hardware test can be done by 3rd party utilities.
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