Application Performance Class can be applied to UHS SDHC/SDXC Memory Card product family.
＊Not only for storing maps, pictures, videos, music, dictionary and documents, the Application Performance Class 1 (A1) also enables user to be freed form sluggish for editing and updating data.
＊The Application Performance Class 2 (A2) makes SD memory card much higher performance than A1 performance by using functions of Command Queuing and Cache. Efficient flash memory management can be supported by Maintenance functions.
Reference soruce: SD Assocation
On Windows 7 / 8 / 8.1 / 10:
1. Open "My Computer."
2. Right click on the drive, and select "Format."
3. Choose NTFS in the File System dropdown box, and click "Start."
TRIM is a command that enables operating system (such as Windows 7) to notify the SSD which data is no longer valid and can be safely deleted. Also, the TRIM works when the SSD is idle so that it can maximize the performance and endurance of a SSD.
ECC (Error correcting Code) automatically detects and corrects data corruption that occurs during reading, writing, storage, transmission or processing. This technology ensures a more complete and safer data transmission.
According to the USB Association, USB 3.0 has been renamed “USB 3.1 Gen 1”. The USB 3.1 Gen 1 specification encompasses the USB 3.0 specification and retains a theoretical transfer rate of 5.0 Gbps, which is 10 times faster than USB 2.0. USB 3.1 Gen 1 (USB3.0) is backward compatible with USB 2.0, but the transfer rate will be limited by the USB 2.0 interface.
Those Symbols, Speed Class, UHS Speed Class and Video Speed Class with a number indicate minimum writing speed, are mainly useful for camcorders, video recorders and other devices with video recording capabilities. Regarding bus mode, it is necessary to use a bus mode fast enough that does not affect memory write speed. Speed Class C10 is used in High Speed mode or faster, UHS Speed Class U1 and U3 are used in SDR50/DDR50 or faster, and Video Speed Class symbols V60 and V90 are used in UHS-II mode or faster. Each Memory card has a symbols or mark on it describing the speed class. Users should choose the proporate card for the devices application.
*Remark: Video Speed Class is defined to answer a demand for high resolution and high quality 4K8K video recording and it also has an important feature to support next generation flash memory such as 3D NAND. Furthermore, as it covers speed of HD(2K) video, it is possible to integrate into Video Speed Class from now on.
*Refource source: SD Association
Please make sure the specification of the Memory Card is compatible with your device.
-SDXC Memory Card can only be used on a device that supports SDXC.
-SDHC Memory Card can be used on a device that supports SDHC and SDXC.
-SD Memory Card can be used on a device that supports SD, SDHC and SDXC.
All storage products will display less than stated memory capacity on a computer. The discrepancy results from different algorithms.
On a computer, 1GB = 1024*1024*1024 = 1,073,741,824 (1024 is 2 to the power of 10, which is the algorithm used by the computer)
For a 32GB pen drive, the computer will calculate it as having capacity of 29.80GB.
32,000,000,000÷1,024÷1,024÷1,024 ≒ 14.90GB.
Also note that each Flash memory may possess innate variances because of its manufacturing process. KINGMAX will therefore adjust the available space on the pen drive to store necessary firmware configurations or system data. Please be assured that we do so at appropriate measures and that your pendrive has the normal capacity.
(1) FAT32 is only supported by memory cards/ pen drives with capacity less than 32GB, and it does not support storing or transmitting any single file that exceeds 4GB in size.
(2) The exFAT file system was released by Microsoft to address FAT32's inability to carry files over 4GB. Also if the capacity of your memory card/pen drive are larger than 32GB, you could format it to exFAT. It depends on the users' need to choose the file system to format the memory cards / pen drives.
Dual-channel memory modules are two memory modules with the same specification, capacity and serial number in the same package.
Because a dual-channel memory is connected to the memory controller through a series of wires, it requires two sets of memory modules with the same capacity and electrical specification. Transfer speed increases as the memory bus capacity increases from 64 bit to 128 bit. Users must install the two modules in the specific DIMM slots to enable dual channel function to have a stable usage.
No, DDR4 memory modules can't be backward compatible with DDR3/DDR2/DDR1. Each module has different pin numbers and notch positions, so they can be installed in repective socket only. The power supply for each generation also varies:
DDR1 DIMMs voltage is 2.5V;
DDR2 DIMM voltage is 1.8V;
DDR3 DIMM voltage is 1.5V (or 1.35V for low-voltage version);
DDR4 DIMM voltage is 1.2V.
Please make sure the memory module is correctly oriented that the notch of the module matches the memory slot, and then gently push the module straight down to the slot.
*Be aware that you must turn the computer off before installing or removing the modules.
There are three standards for capacity:
· SD standard - Up to 2GB SD memory card using FAT 12 and 16 file systems
· SDHC standard - over 2GB-32GB SDHC memory card using FAT32 file system
· SDXC standard - over 32GB-2TB SDXC memory card using exFAT file system
Reasons causing memory card read failure are as follows:
1. Power of camera is switched OFF while the camera is accessing data.
2. Taking a picture when the battery is low.
3. Withdrawing the memory card when the camera is accessing data.
The remedy to the above problems is to avoid incorrect use of the memory card. If unfortunately any of the above happens, use PC and a card reader to re-format the memory card.
There are two main reasons for data corruption in a memory card.
1. Taking pictures or recording with a camera that is running low on batteries, or has an unstable power supply.
2. Removing the memory card from a device during a read/write operation. Please make sure that you have safely ejected your memory card before unplugging it from your device.
* Please format your memory card in the camera before using.
The majority of digital cameras only support the FAT format; if you have formatted the memory card in another format (NTFS or FAT32), your camera may fail to recognize the card. You will have to re-format the card by selecting the FAT format.
It is recommended to format a memory card before using it. For using on a cell phone or a camera, it is recommended to
format the card with the cell phone or camera intended to use the card since formatting with the intended device will
have preset directories created onto the card. In the case of formatting a memory card with a PC but using it on a
camera or cell phone, the device may have problems recognizing and utilizing the card.
1. Checking the compatibility of mobile phone the memory.
Please check the specifications of your mobile phone and make sure the memory card is compatible with your mobile. Some mobile phone support less than 32GB memory card, and 64GB card can't work on it.
2. Formatting file system. With 64GB memory card supported the default format file system is exFAT and it may not work with the cards be formatted by FAT32. And you need to re-format the card on your mobile phone again.
3. The memory card might broke down. Please go back to the place you bought the card and check about the after service issues.
The size limit of an FAT32 single file is 4GB, therefore a movie exceeding 4GB cannot be stored. You may format your USB disk with NTFS format to enable storing single files that exceed 4GB.
Looking forward to serving you!
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Tel：+886-3-6688789 / Fax：+886-3-5510505
allison@quanxingtech.cn
ZIP code : 303253 No. 155, Aikou 2nd Rd., Zhubei City,
Hsinchu County 302, Taiwan (R.O.C.)
allison@quanxingtech.cn
8F, Vanke Binhai Cloud Center, No.3 Tairan 8th Road,
Futian District, Shenzhen
