Will SDXC cards work on SDHC host devices?
Yes, SDXC cards work on SDHC host devices. The image below shows the host device and the memory cards supported in detail. Cards and host devices -SDUC memory cards must only be used with SDUC host devices. -SDXC memory cards can be used with SDXC and SDUC host devices. -SDHC memory cards can be used with SDHC, SDXC and SDUC host devices. -SD memory cards can be used with SD, SDHC, SDXC and SDUC host devices. Additional info on cards and host devices -SDUC Host Devices can use SD, SDHC, SDXC and SDUC memory cards. -SDXC Host Devices can use SD, SDHC and SDXC memory cards. -SDHC Host Devices can use both SD and SDHC memory cards. -SD Host Devices can only use SD memory cards. *Source: SD Association
What operating systems support SDXC/ mircoSDXC/ exfat file system?
SDXC/microSDXC cards and 256GB CompactFlash cards are formatted natively in the exFAT file system. Flash Drives may also be formatted in exFAT. The operating system must support the exFAT file system in order for these devices to function properly. You may need to update the operating system on your devices to recognize the SDXC/microSDXC cards. Operating Systems that Support the exFAT File System NOTE: Some Host devices may NOT support SDXC cards. SDXC/microSD cards CANNOT be used with Windows 98, Me, 2000.
How do I recover missing or deleted files on my memory card?
Lexar recommend using the Lexar Recovery Tool. You can download the Tool at https://www.lexar.com/support/downloads/. Please refer to the Lexar Recovery Tool section under FAQ page for detail. Disclaimer: Lexar does not guarantee to recover any your missing or deleted files. Lexar assumes no liability for damage to the customer’s equipment or data caused by the use or misuse of the format functions.
How do I update my SONY camera firmware to be compatible with Lexar Professional SD cards:
The SONY camera models below may have compatibility issues if the latest firmware has not been updated to the versions in Step 2. Camera models: Sony Alpha 9 (SONY ILCE-9) Sony Alpha 7R III (SONY ILCE-7RM3) Sony Alpha 7 III (ILCE-7M3) If you’ve encountered this error message, please follow the steps below to update your SONY camera firmware. Step 1. Check the firmware version on your camera: Select Menu > Setup subpage  > Version on the camera. The system software (firmware) version will be displayed as shown below. Step 2. Please use the links below to download the latest firmware and follow the installation instructions from the SONY website.
|Camera model||Firmware versions||Links for download and detailed installation instructions|
|Sony Alpha 9 (SONY ILCE-9)||Ver6.0||Windows: Click here Mac: Click here|
|Sony Alpha 7R III (SONY ILCE-7RM3)||Ver3.01||Windows: Click here Mac: Click here|
|Sony Alpha 7 III (ILCE-7M3)||Ver3.01||Windows: Click here Mac: Click here|
What is SD UHS?
UHS stands for “Ultra High Speed” and refers to the new technology that enables higher bus interface speeds on Secure Digital High Capacity (SDHC) and Secure Digital Extended Capacity (SDXC) cards. UHS-I defines interface speeds up to 104MB/sec. A SDHC or SDXC card that supports “UHS” could have performance up to 104MB/sec. UHS-II is the next generation of UHS. UHS-II improves the interface speed up to 312MB/s. That is 3 times faster than UHS-I. *Source: SD Association
What is the U1/U3 speed class?
Some of the new UHS memory cards may have a U1 marking, which refers to the U1 Speed Class designed for UHS-I card. The U1 Speed Class designates a minimum capture (write) performance of 10Mbytes per second for recording streaming video content. Note that although U1 is the same speed as Speed Class 10, they are tested differently, and meeting one does not imply that the other is met by the card. U3 Speed Class means that the memory card performance needs to reach 30MB/s to meet 4K resolution recording and play.
What is the V30/V60/V90 video speed class?
A constant writing speed class for video recording. There are three kinds of Speed Classes, "Speed Class", "UHS Speed Class" and "Video Speed Class." This Speed Class provide the constant speed necessary for video recording by designating a minimum writing performance, this include V6、V10、V30、V60 and V90. V6 Speed Class means that the minimum write speed of the memory card needs to reach 6MB/s, V10 is 10MB/s, 30 is 30MB/s, and so on. V60 and V90 can be applied to high resolution and high quality 8K video recording, and V30 can be applied to 4K resolution. SD makers will print these speed class symbols on memory card (V60, V90…etc.). These speed class symbols will be applied to SDHC, SDXC, UHS-I, UHS-II and SD memory card help users decide the best combination for reliable recording. *Source: SD Association
What is A1/A2 application performance class?
It is used for smartphone application performance classification. Application Performance Class 1 (A1) and Class 2 (A2) defines the minimum average of random read/write IOPS. IOPS specification of A1 is read 1500IOPS /write 500IOPS, and the minimum sustained sequential performance is 10MB/s. IOPS specification of A2 is several times faster than A1. The random read is 4000IOPS, and the random write is 4000IOPS. That means the write performance of A2 is faster than A1 read performance, and the minimum sustained sequential performance is also 10MB/s. *Source: SD Association
What host devices in the market compatible with Lexar SD/microSD？
Please refer to Lexar compatibility list..
What is SD/SDHC/SDXC/SDUC?
*Source: SD Association