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Fail-safe exFAT® driver for USB drives and SD™ memory cards
Microsoft exFAT by Tuxera
Product overview
Our commercial-grade exFAT solution breaks through traditional storage limits while keeping your data secure. When power cuts happen, your files stay safe. Your flash memory lasts longer, and everything works seamlessly across all operating systems and devices. That’s why billions of devices worldwide rely on our Microsoft-licensed solution. And, if you need to work with SD cards larger than 2TB, we’re the only provider who can help.
Our patented Smart Allocator writes your data in an organized pattern instead of scattering it across your storage. This means less fragmentation and a longer lifespan for your inherently short-lived NAND flash. You’ll get maximum throughput with reduced latency, keeping your systems running smoothly when it matters most.
Microsoft exFAT by Tuxera keeps your data intact, no matter what gets thrown at it. It ensures file system integrity and prevents metadata corruption if the storage is removed or the power is disconnected. You can trust that your critical information stays secure, no matter the interruption.
Tuxera Persistence Manager™ lets you control exactly when and how data is committed to storage. It reduces latency and and establishes max throughput. Configure the manager based on time intervals or file size to optimize power consumption and hardware costs. This works perfectly for dashcams and other recording devices that need reliable, fail-safe performance.
The tuxera difference
“We chose Tuxera for the proven reliability, fail-safety, and premium quality of their solutions. Having worked with Tuxera before, we knew the level of data transfer speed and data integrity we could achieve for our…
”Alpine Electronics works continuously to bring new innovations to the automotive industry. We look forward to a long-term partnership with Tuxera with whom we can leverage together our leaderships to fulfill the connectivity needs of…
“We had a fantastic experience from Tuxera. The support was wonderful and the autobuild delivery service was both easy to understand and use. Our engineers felt it was very convenient to be able to communicate…
“We chose Tuxera for the proven reliability, fail-safety, and premium quality of their solutions. Having worked with Tuxera before, we knew the level of data transfer speed and data integrity we could achieve for our…
”Alpine Electronics works continuously to bring new innovations to the automotive industry. We look forward to a long-term partnership with Tuxera with whom we can leverage together our leaderships to fulfill the connectivity needs of…
“We had a fantastic experience from Tuxera. The support was wonderful and the autobuild delivery service was both easy to understand and use. Our engineers felt it was very convenient to be able to communicate…
We are here to help
Have a question or need guidance? Whether you’re searching for resources or want to connect with an expert, we’ve got you covered. Use the search bar on the right to find what you need.
Suggested content for:
Your mission-critical systems demand uncompromising reliability. Tuxera products mean absolute data integrity. We specialize in file systems, software flash controllers, and secure networking and connectivity solutions. We are the perfect fit for data-intensive, mission-critical workloads. Using Tuxera’s time-proven solutions means that your data is safe and secure – always.
Our solutions are trusted by major brands worldwide. When you need reliable, scalable, and lightening-fast data access and transfer across any system or device, Tuxera delivers. Our track record speaks for itself. We’ve been in this business for decades with a clear mission: to be the partner you can trust. Read on to find out more.
From satellites to smart meters, our software protects critical data and ensures seamless connectivity wherever mission-critical systems operate.
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The perfect solution for your industry
Our exFAT solution is ideal for external media applications that handle large files, like SD cards, USB drives, and hard drives. It’s compatible with a wide range of RTOSe like Linux, Android, and QNX.
Protect critical video recordings in dashcams, DVRs, and infotainment systems. Our solution handles files larger than 4GB with seamless compatibility across all platforms.
Learn more
Ensure all data from industrial cameras, drones, and data loggers remains intact during unexpected power events, while extending your storage lifespan.
Learn more
Protect sensitive patient data and large diagnostic files with fail-safe storage that maintains integrity even during unexpected power interruptions.
Learn moreFrequently asked Questions
Here are answers to what customers typically ask about Microsoft exFAT by Tuxera. Just reach out if your question isn’t listed here.
Our solution continuously maintains file system integrity in the background rather than relying on journaling. This means if power is lost, your system doesn’t need to spend time recovering from a journal before booting. Our linear writing pattern ensures metadata remains available and your system is always in a correct state.
Pricing varies based on your specific requirements, deployment scale, and support needs. Contact our team for a customized quote that fits your project.
Our implementation offers significantly better power fail-safety, optimized data allocation, and licensed Microsoft patent compliance. Open-source solutions typically use journaling, which requires recovery time after failures and can lead to fragmented data that slows performance over time. Our Smart Allocator ensures consistent performance and extends flash memory life, while our background maintenance eliminates recovery delays after power interruptions.
Standardized with the Microsoft exFAT file system specification and conforms to SD File System Specification developed by the SD Association (SDA).
Advanced file system check and repair tools maintain file system consistency, fix corrupted volumes, and recover lost files. Tuxera Persistence Manager™ add-on provides flexible, controlled data flushing for improved reliability.
Supported architectures: ARM, ARM64, Intel x86/x86_64 or compatible, MIPS, MIPS64, PowerPC, SH4 – virtually any 32-bit or 64-bit platform.
Memory requirements: Operates on systems with as low as 16 KB of RAM.
Android, Linux, RTOSes such as QNX and ThreadX. Available for a wide range of RTOS environments. Specifications may vary depending on OSes.
Android, Linux, QNX, FreeRTOS, SafeRTOS, Integrity, ThreadX
Available on a wide range of RTOS environments. Features and/or
specifications may vary depending on the operating system
ARM, ARM64, Intel x86/x86_64 or compatible, MIPS, MIPS64,
PowerPC, SH4, and more
• Conforms to all Microsoft exFAT versions including XP, Vista, Windows 7, Windows 8, Windows 10 (Microsoft Interop Vendor Alliance), and Windows 11
• Conforms to SD Association (SDA) specifications
• Support for all flash-based storage types such as SD cards, eSD, CF cards, SSD, UFS, USB-connected storages, SATA, eSATA, FireWire, and eMMC
• Support for APM, GPT, and MBR partition schemes
• Maximum volume size: 128 PiB
• Minimum cluster size: 512 bytes
• Maximum cluster size: 32 MiB
• Maximum file size: 128 PiB*
• Maximum number of entries per directory: 2,796,202
• Maximum filename length: up to 255 characters
• Supported sector sizes: 512, 1024, 2048, and 4096 bytes
The operating system and hardware platform may place additional limits
on maximum file size. E.g., Linux on 32-bit platforms limits the maximum
file size to 8 TiB with 4 KiB page size, and 128 TiB with 64 KiB page size
• 1 MiB of RAM
• Processor: 25 MHz
• Read-write: 70-90 KiB
• Read-only: 40-60 KiB
• CPU usage: 0-10%
Volume consistency ensured if storage is removed, or power or
battery is disconnected
Tuxera maintains POSIX File System Test Suite. The following
system calls are tested:
• chmod: changes permission
• chown: changes ownership
• mkdir: creates directories
• open: opens a file
• rename: changes file name
• rmdir: removes directories
• truncate: decreases/increases file size
• unlink: removes files
Microsoft exFAT by Tuxera uses free space bitmaps to reduce
fragmentation and to improve space allocation when files are
deleted
• Unicode Character Set (UTF-16). Exceptions: U+0000 (NUL)
through U+001F (US), / (slash), \ (backslash), : (colon),
*(asterisk), ? (question mark), “ (quote), < (less than), > (greater
than), and | (pipe)
• Unicode fulfills the need to support character differences in
national and regional languages (Japanese, Korean, Chinese,
Western, etc.).
OEM Parameters Sector for device-dependent parameters
Support for Universal Coordinated Time (UTC) timestamps
• Active superblock (FAT), file, directory, attribute and data caching. Advanced algorithms and data structures ensure maximum I/O throughput, low CPU usage for small and large files, and achieve high IOPS for file operations. Tunable settings. Low power use optimized for increased battery life.
• Free Area Management: Allocation Bitmap
• Cluster Chain Management:
• FAT Chain
• Directory Entry
• FAT + Continuous Information
• Name Search: Comparison of Name
• When saving files to SD, SDHC, SDXC, or SDUC cards, full
speed can be achieved
• Zero-copy support (direct I/O)
• Low data fragmentation
Rigorous quality assurance, wide deployment, and fault-tolerant
design guarantee outstanding file system robustness
Provides maintenance services so exFAT development can be
safely customized using:
• Product answers to inquiries
• Minor version product available
Proprietary, commercial
Note! Tuxera licenses the exFAT software implementation. We’re also a
part of the Microsoft exFAT licensing program. With our special
arrangement with Microsoft, you can purchase our proprietary exFAT file
system implementation, already covered by a full Microsoft exFAT
patent license.
• mkexfat: formats volumes
• exfatck: checks and repairs volumes
• exfatlabel: shows/sets volume label
• exfatsvn: displays/changes the volume serial number on an
exFAT file system
• exfatdebug: collects debug images
Recovery in the event of power failure or hot-unplug.
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Suggested content for:
Your mission-critical systems demand uncompromising reliability. Tuxera products mean absolute data integrity. We specialize in file systems, software flash controllers, and secure networking and connectivity solutions. We are the perfect fit for data-intensive, mission-critical workloads. Using Tuxera’s time-proven solutions means that your data is safe and secure – always.
Our solutions are trusted by major brands worldwide. When you need reliable, scalable, and lightening-fast data access and transfer across any system or device, Tuxera delivers. Our track record speaks for itself. We’ve been in this business for decades with a clear mission: to be the partner you can trust. Read on to find out more.
From satellites to smart meters, our software protects critical data and ensures seamless connectivity wherever mission-critical systems operate.
We couldn't find any matching results. Please try searching with different keywords or browse our popular tags below.
