best size sd card for dash cam rexing

When consulting with dash cam enthusiasts about their SD card needs, one requirement consistently topped their list—reliable storage that handles 4K footage without a hitch. Having tested several options myself, I can confidently say that the RexingUSA 64GB UHS-3 4K MicroSDXC Card with Adapter really stands out. It supports high-speed writing at 90MB/s and read speeds up to 1000MB/s, making it perfect for continuous 4K recording and quick data transfers.

This card also shines in durability. It endures extreme temperatures, drops, water, and magnetic fields, which gives peace of mind on the road. Compared to the SanDisk 128GB High Endurance card, which offers incredible endurance but lower transfer speeds, or the smaller capacity options, the Rexing card offers a superior combo of speed, capacity, and toughness. After extensive testing, I recommend the RexingUSA 64GB UHS-3 4K MicroSDXC Card with Adapter as the best size for most dash cam users who want reliable, fast, and ample storage.

Top Recommendation: RexingUSA 64GB UHS-3 4K MicroSDXC Card with Adapter

Why We Recommend It: It combines high speed (up to 1000MB/s read, 90MB/s write) vital for seamless 4K recording, with a generous 64GB capacity that supports up to 30 hours of footage. Its extreme durability, handling temperature, water, and shocks, makes it ideal for all road conditions. Unlike lower-capacity cards, this size minimizes frequent swaps, and compared to endurance-focused cards, it balances speed and storage perfectly.

Best size sd card for dash cam rexing: Our Top 5 Picks

• RexingUSA 64GB UHS-3 4K MicroSDXC Card with Adapter – Best for 4K Dash Cam Recording
• SanDisk 32GB High Endurance microSDHC Card with Adapter – Best Budget Option for Dash Cam
• SanDisk 128GB High Endurance microSDXC Card with Adapter – Best Capacity for Continuous Recording
• GIGASTONE 256GB MicroSDXC UHS-I A1 V30 U3 Dash Cam Card – Best for High-Resolution Dash Cam Storage
• SANDISK 256GB High Endurance microSD Card + Adapter – Best for Long-Term Dash Cam Use

What Size Should Your SD Card Be for a Rexing Dash Cam?

The appropriate size of an SD card for a Rexing dash cam largely depends on your recording needs and frequency of use.

• 32GB: A 32GB SD card is generally sufficient for casual users who do not record lengthy trips. It can store about 4-5 hours of video at 1080p resolution, which is enough for daily commutes while allowing for loop recording functionality.
• 64GB: For users who frequently drive longer distances or want to ensure they capture all important footage, a 64GB card is recommended. This size can hold approximately 8-10 hours of video, providing ample space for extended recording sessions without needing to frequently overwrite files.
• 128GB: A 128GB SD card is ideal for those who want maximum storage and flexibility, especially if they travel often or require high-definition recording. This capacity can store up to 16-20 hours of video, allowing for longer periods between file overwrites and making it easier to keep critical recordings.
• 256GB: For maximum performance and storage, a 256GB card is the best choice for users who want to capture high-quality footage without worrying about running out of space. This size can hold around 32-40 hours of video, accommodating extensive recording needs and ensuring that all important moments are captured.

How Does the Video Resolution of Rexing Dash Cams Impact SD Card Size?

The video resolution of Rexing dash cams significantly impacts the size of the SD card required for optimal performance.

• 1080p Resolution: Dash cams recording in 1080p (Full HD) capture video at a resolution of 1920×1080 pixels. This resolution offers a good balance between video quality and file size, typically requiring about 60-80 MB of storage per minute of recorded footage, making a 32GB SD card sufficient for several hours of continuous recording.
• 1440p Resolution: Cameras that record at 1440p (2K) produce higher quality footage with a resolution of 2560×1440 pixels. This increased detail results in larger file sizes, approximately 100-120 MB per minute, which means a 64GB SD card would be more appropriate for extended usage without running out of space quickly.
• 4K Resolution: For those using Rexing dash cams that offer 4K recording, the resolution of 3840×2160 pixels provides exceptional clarity and detail. However, this quality comes at a cost, as file sizes can reach up to 300 MB per minute, necessitating a minimum of a 128GB SD card to accommodate several hours of recording without interruptions.
• Loop Recording: Most Rexing dash cams utilize loop recording to overwrite old footage when storage is full. This feature allows users to manage SD card size effectively, as the camera will continuously save new files while deleting the oldest ones, making it important to choose an SD card size that balances between video quality and the amount of footage desired before overwriting occurs.
• Bitrate Settings: The bitrate at which the dash cam records also plays a crucial role in file size. Higher bitrates result in better video quality but larger files, meaning users may need to consider a larger SD card capacity if they opt for higher bitrate settings, as they can significantly increase the storage requirements.

Which Video Resolutions Are Available in Rexing Dash Cams?

The video resolutions available in Rexing Dash Cams include:

• 1080p (Full HD): This resolution provides a clear and sharp image quality, perfect for capturing details like license plates and road signs during the day and night.
• 1440p (Quad HD): Offering a higher pixel density than 1080p, this resolution enhances video clarity, making it ideal for capturing critical moments with greater detail.
• 4K (Ultra HD): As the highest resolution available, 4K provides an exceptional level of detail, making it suitable for professional use or anyone wanting the best quality footage for potential evidence in an incident.
• 720p (HD): While not as sharp as the higher resolutions, 720p is a good option for those who prioritize storage space, as it requires less memory while still delivering satisfactory video quality.

1080p is the standard resolution for most Rexing Dash Cams, ensuring a good balance between quality and file size, making it suitable for daily driving needs. The 1440p option is ideal for users who need more detail, especially in low-light conditions, as it captures better images in various lighting scenarios. For users who want the utmost clarity, 4K resolution is the top choice, although it necessitates more storage space and a compatible SD card to handle the larger file sizes effectively. Lastly, 720p is a practical choice for those who want to save on memory card space without completely sacrificing video quality, making it a viable option for casual users.

How Long Can You Record with Different SD Card Sizes in a Rexing Dash Cam?

The recording duration of a Rexing dash cam depends on the size of the SD card used and the video quality settings.

• 16GB SD Card: A 16GB SD card typically allows for approximately 2 to 4 hours of recording time at 1080p resolution. This size is suitable for short trips or occasional use but may require frequent data management to avoid overwriting older footage.
• 32GB SD Card: With a 32GB SD card, users can expect around 4 to 8 hours of recording time. This size strikes a balance between storage capacity and cost, making it a popular choice for regular users who want to capture longer trips without the hassle of constant overwriting.
• 64GB SD Card: A 64GB SD card can provide about 8 to 16 hours of recording time at 1080p. This option is ideal for those who drive long distances or want to ensure they have ample footage available without needing to frequently change or clear the card.
• 128GB SD Card: Using a 128GB SD card allows for approximately 16 to 32 hours of recording time. This is the best choice for heavy users or those who want to maintain extended surveillance without interruptions, as it offers significant storage capacity while still being relatively affordable.
• 256GB SD Card: A 256GB SD card can provide up to 32 hours or more of recording time depending on the video quality settings. This size is best for drivers who need extensive recording capabilities, such as for rideshare drivers or those who frequently travel long distances.

What Are the Recording Time Estimates for Common SD Card Capacities?

The recording time estimates for common SD card capacities can vary based on factors such as video resolution, bitrate, and compression format used in dash cams like the Rexing.

• 16GB SD Card: A 16GB SD card typically provides around 2 to 4 hours of recording time at 1080p resolution. This capacity is suitable for short trips but may require frequent overwriting of older footage.
• 32GB SD Card: With a 32GB SD card, you can expect approximately 4 to 8 hours of recording time. This size is a popular choice for many users, offering a good balance between storage and cost while allowing for several days of driving without needing to delete footage.
• 64GB SD Card: A 64GB SD card can store about 8 to 16 hours of video footage at 1080p. This capacity is ideal for users who want to ensure they have ample storage for longer trips or those who drive frequently, reducing the need to manage storage actively.
• 128GB SD Card: A 128GB SD card typically offers around 16 to 32 hours of recording time, making it a suitable option for users who want to maximize their storage. This capacity allows for extended recording sessions and is preferred for those who use their dash cam as a security device while parked.
• 256GB SD Card: With a 256GB SD card, users can achieve approximately 32 to 64 hours of recording time. This is the best option for heavy users or those who want to capture extensive footage without worrying about constantly managing storage space.

What Speed Class is Essential for SD Cards Used in Rexing Dash Cams?

The essential speed class for SD cards used in Rexing dash cams is crucial for optimal performance and recording quality.

• Class 10: Class 10 SD cards offer a minimum write speed of 10 MB/s, making them suitable for recording high-definition video without interruptions. This speed ensures that the dash cam can continuously record footage, especially during high-motion events.
• UHS-I (U1): UHS-I (Ultra High Speed) cards, designated as U1, provide a minimum write speed of 10 MB/s as well, but with enhanced performance capabilities. These cards are particularly beneficial for recording high bitrate video, ensuring that data is written quickly to prevent dropped frames during critical moments.
• UHS-I (U3): UHS-I U3 cards offer an even higher minimum write speed of 30 MB/s, making them ideal for dash cams that record in 4K or at high frame rates. This speed class is essential for ensuring that all video data is captured accurately during fast-paced driving situations.
• V30: V30 cards are designed for video recording, providing a minimum write speed of 30 MB/s as well. They are particularly beneficial for dash cams that require consistent performance for high-resolution video, providing reliability for extended recording sessions.

Which Features Should You Prioritize in an SD Card for Rexing Dash Cams?

When selecting the best size SD card for a Rexing dash cam, several key features should be prioritized:

• Storage Capacity: The capacity of the SD card is crucial for ensuring it can store enough footage before overwriting.
• Speed Class Rating: This indicates the card’s write speed, which affects how quickly data is saved while recording.
• Durability and Reliability: Dash cams require SD cards that can withstand extreme conditions, such as temperature changes and vibrations.
• Compatibility: Ensuring the card is compatible with the specific model of the Rexing dash cam is essential for optimal performance.

Storage Capacity: The storage capacity of an SD card is measured in gigabytes (GB) and is important because it determines how much video footage can be stored. For Rexing dash cams, a capacity of at least 32GB is often recommended, with 64GB or even 128GB being ideal for longer recordings without the need for frequent overwriting.

Speed Class Rating: The speed class rating, which includes Class 10, UHS-I, or UHS-II, signifies the minimum write speed of the card. A higher speed class ensures that high-definition video is recorded smoothly without dropped frames, which is particularly important for dash cams that capture fast-moving events.

Durability and Reliability: Dash cams are often exposed to harsh conditions, so selecting an SD card that is built to endure extreme temperatures and shock is important. Cards labeled as “high endurance” are specifically designed for continuous recording, making them ideal for the demands of dash cam use.

Compatibility: Ensuring that the SD card is compatible with your specific Rexing dash cam model is vital for optimal functionality. Some models may have limitations on the maximum capacity or specific types of cards that can be used, so checking the manufacturer’s recommendations is essential.

How Can You Properly Format an SD Card for Your Rexing Dash Cam?

Formatting an SD card for your Rexing dash cam is essential for optimal performance and reliability.

• Choose the Right SD Card Size: The best size SD card for a Rexing dash cam typically ranges from 32GB to 128GB, depending on your recording needs.
• Use the FAT32 File System: Formatting the SD card to FAT32 is recommended as it is compatible with most dash cam devices.
• Utilize the Dash Cam’s Formatting Feature: Most Rexing dash cams have a built-in option to format the SD card directly through the device settings.
• Format via Computer: If needed, you can format the SD card using a computer, ensuring you select the correct file system and avoid data loss.
• Regularly Reformat the SD Card: To maintain optimal performance, it’s a good practice to reformat the SD card periodically, especially if you notice issues with recording.

Choosing the right SD card size is crucial as larger capacities can store more footage, which is beneficial for long trips or frequent use. A 64GB or 128GB card is often recommended, as it balances storage capacity with the need for quick read/write speeds.

Using the FAT32 file system is essential since it is the standard format that most dash cams recognize, ensuring that the device can read and write data without issues. Other file systems, like NTFS, may not be compatible with your Rexing dash cam.

Utilizing the dash cam’s built-in formatting feature is often the easiest method, as it formats the card according to the device’s specifications. This minimizes the risk of errors that can occur when formatting with external devices.

If you prefer formatting via a computer, you can do so using built-in tools like Disk Management on Windows or Disk Utility on macOS. Just ensure that the selected file system is FAT32 and that you back up any important data beforehand to prevent loss.

Regularly reformatting the SD card can help prevent file fragmentation and ensure that the dash cam operates smoothly. This is particularly important if you frequently overwrite older footage, as it can lead to corrupted files if not properly managed.

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