Lexar SILVER Series User Manual

Q&A 1 – Card not recognized by computer
The issue could be the card is not recognized on a card reader.
1. Memory card locked or write protected? If you see “SD card locked” on your digital
camera or “The disk is write-protected?” on your computer, you should turn off the
write-protect lock.
2. Insert the card into a UHS-II card reader, and connect the reader to your computer.
We suggest using a Lexar Card reader for confirmed compatibility. If the connection
works fine, open the Disk Management on your computer and check if the capacity
and the formatting with SD Formatter tool is successful.
3. If you cannot format the card and there is no appearance damage, suggest
contacting Lexar Technical Support for RMA process.
Q&A 2 - Card not recognized by camera
1. It’s important to choose the right card for your camera. Please refer to the Lexar
Compatibility Guide on Lexar.com or your device’s user manuals to choose the right
card for your camera and applications. If you choose an unsuitable card, it will cause
the continuous high-bit video recording to record slowly and cause dropped frames
or loss of data.
2. Make sure the card's file system is compatible with your camera. The file system of
RAW will not be recognized by a camera.
3. Check whether the card is caused by poor contact: whether the card is fully inserted
into the card slot, or the card PIN is dirty.
4. Connect the card to the computer with a UHS-II card reader. If the card is
recognized by computer, check if the SD Formatter tool works normal. If you can
format successfully, insert the card into the camera to check if the card works. If you
cannot format the card, suggest contacting Lexar Technical Support for RMA
process.
Q&A
1667x UHS-II Cards
SILVER Series

Lexar SILVER Series Specifications

General

Interface	SD 3.0
Read Speed	Up to 150MB/s
Write Speed	Up to 80MB/s
Operating Temperature	0°C to 70°C
Storage Temperature	-25°C to 85°C
Weight	Approx. 0.5g

Summary

Card Not Recognized by Computer

Memory Card Locked or Write Protected

Check write-protect lock if camera shows "SD card locked" or computer shows "disk is write-protected".

Insert Card into UHS-II Card Reader

Use UHS-II reader, check Disk Management, and formatting with SD Formatter.

Contact Support if Formatting Fails

Contact Lexar Technical Support for RMA if card cannot be formatted without damage.

Card Not Recognized by Camera

Choose the Right Card for Your Camera

Refer to Lexar Compatibility Guide or device manuals for correct card selection to avoid issues.

Ensure File System Compatibility

Ensure camera compatibility with card file system; RAW is not recognized.

Check for Poor Contact

Verify card insertion and slot/pins cleanliness to rule out contact issues.

Test Card with Computer and Formatter

Test with computer/formatter; contact support if formatting fails.

Not Recognized on Computer

Proper SD Card Insertion

Ensure metal contacts face down, do not force insertion to prevent damage.

Mounting Issues and Reformatting

Reinsert card; reformat if it still won't mount, referencing Apple's guide for Mac.

Computer Recognition and Formatting Test

Test connection and formatting; contact support if formatting fails.

SD Card Not Showing Full Capacity

Usable Capacity Variation

Explains capacity difference due to binary vs. decimal calculation and formatting overhead.

Reserved Capacity for Functions

Part of capacity is reserved for formatting and optimizations, not user files.

Check Disk Management and Format

Check disk management, delete allocated space, and format if needed; contact support if formatting fails.

Speed Slow on Camera

Select Compatible Card for Camera

Use Lexar Compatibility Guide or manuals to select the correct card for camera and applications.

Check Write Speed Against Requirements

Verify write speed compatibility with high-frame rate/RAW modes; lower mode or replace card if needed.

Use Correct Card Slot Protocol

Ensure UHS-II card is in a UHS-II slot to achieve maximum performance.

Format Card Before Camera Use

Format the card on the camera or use SD Memory Card Formatter for optimal performance.

About the Speed Test

Match Test Environment to Card Specs

Use UHS-II reader and USB 3.1 interface for testing SD UHS-II cards.

Recommended Formatting and Testing Tools

Format in low-speed mode, use overwrite format, and test with tools like CrystalDiskMark/ATTO.

Mac Models Supporting UHS-II

Specific Mac models support UHS-II for optimal Lexar card performance.

Recover Missing or Deleted Files

Use Lexar Recovery Tool

Download and use the Lexar Recovery Tool; refer to its Quick Start Guide for instructions.

Additional Tips for Card Health

Format Card on New Camera/Reader

Format the card on the new camera or reader before use, backing up data first.

Avoid Removing Card During Data Transfer

Avoid removing the card during data transfer to prevent incomplete capture.

Do Not Insert/Remove Card While Powered On

Do not insert or remove the card while the device is powered on to prevent damage or data loss.

Pause Shooting if Device Overheats

Pause shooting if the device overheats to maintain an acceptable operating temperature.

Always Use a Card Reader

Use Compatible Card Reader

Use a compatible UHS-I or UHS-II card reader for optimal performance and compatibility.