FAQ
What do the specifications visible on the front side of the microSD memory card mean?
microSDXC
V90 = Video Speed Class
SDXC = Memory Card Type
512GB = Capacity
AV PRO SD = Name of the Card
300MB/s = Max Read Speed
II = Bus Interface
C10 (The little circle above the II) = Speed Class
U3 = UHS Speed Class
Video Speed Class: The Speed Class of an SD card is identified by a number enclosed within the letter C. This number specifies the minimum sequential write speed. For instance, if you have an SD card labeled as C10, it ensures a consistent write speed of 10 MB/s. This Speed Class encompasses five ratings: C2, C4, C6, C8, and C10.
UHS Speed Class: The UHS Speed Class is indicated on the card with a number inside the letter U. Here, you should multiply the number by 10 to determine the minimum sequential write speed. For example, a U3 card ensures a consistent write speed of 30 MB/s. This class has two ratings: UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3).
Video Speed Class: The Video Speed Class is indicated on the card with the letter V followed by a number. This number represents the minimum sequential write speed in MB/s. The SD Card Association has established five speed ratings in this category: V6, V10, V30, V60, and V90.
Bus Interface: The bus interface on a memory card sets its maximum data transfer speed. Most modern SD cards use UHS-I or UHS-II, indicated by"I" or "II" (UHS for Ultra High Speed). UHS-I offers speeds up to 104 MB/s, and UHS-II can reach 312 MB/s. While UHS-II cards work in UHS-I-compatible devices, their speed is limited in those devices.
Read Speed: The read speed is typically measured in Megabytes per second (MB/s) and determines the card's data retrieval speed. A higher read speed translates to quicker data transfers. In practical terms, when transferring your photos and videos from the card to your computer, a card with a higher read speed will complete the task more rapidly.
Capacity: The Capacity is presented in Gigabytes (GB) and indicates the card's storage space. In simple terms, it tells you how much data the card can hold.
SD Card Types: There are three different types of SD Cards: SD, SDHC, and SDXC. These types of markings aren't indicators of performance or form factor differences but, instead, specify the capacity range and file system use. -SD (Secure Digital) cards use FAT12 or FAT16 file systems, with capacities from 64 MB to 2 GB. -SDHC (Secure Digital High Capacity) cards utilize FAT32 and offer 4 GB to 32 GB capacities. -SDXC (Secure Digital Extended Capacity) cards employ exFAT and are available from 64 GB to 2 TB.
SDXC = Memory Card Type
512GB = Capacity
AV PRO SD = Name of the Card
300MB/s = Max Read Speed
II = Bus Interface
C10 (The little circle above the II) = Speed Class
U3 = UHS Speed Class
Video Speed Class: The Speed Class of an SD card is identified by a number enclosed within the letter C. This number specifies the minimum sequential write speed. For instance, if you have an SD card labeled as C10, it ensures a consistent write speed of 10 MB/s. This Speed Class encompasses five ratings: C2, C4, C6, C8, and C10.
UHS Speed Class: The UHS Speed Class is indicated on the card with a number inside the letter U. Here, you should multiply the number by 10 to determine the minimum sequential write speed. For example, a U3 card ensures a consistent write speed of 30 MB/s. This class has two ratings: UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3).
Video Speed Class: The Video Speed Class is indicated on the card with the letter V followed by a number. This number represents the minimum sequential write speed in MB/s. The SD Card Association has established five speed ratings in this category: V6, V10, V30, V60, and V90.
Bus Interface: The bus interface on a memory card sets its maximum data transfer speed. Most modern SD cards use UHS-I or UHS-II, indicated by"I" or "II" (UHS for Ultra High Speed). UHS-I offers speeds up to 104 MB/s, and UHS-II can reach 312 MB/s. While UHS-II cards work in UHS-I-compatible devices, their speed is limited in those devices.
Read Speed: The read speed is typically measured in Megabytes per second (MB/s) and determines the card's data retrieval speed. A higher read speed translates to quicker data transfers. In practical terms, when transferring your photos and videos from the card to your computer, a card with a higher read speed will complete the task more rapidly.
Capacity: The Capacity is presented in Gigabytes (GB) and indicates the card's storage space. In simple terms, it tells you how much data the card can hold.
SD Card Types: There are three different types of SD Cards: SD, SDHC, and SDXC. These types of markings aren't indicators of performance or form factor differences but, instead, specify the capacity range and file system use. -SD (Secure Digital) cards use FAT12 or FAT16 file systems, with capacities from 64 MB to 2 GB. -SDHC (Secure Digital High Capacity) cards utilize FAT32 and offer 4 GB to 32 GB capacities. -SDXC (Secure Digital Extended Capacity) cards employ exFAT and are available from 64 GB to 2 TB.
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