exFAT (Extended File Allocation Table) is a file system developed by Microsoft that bridges the gap between the older FAT32 standard and modern storage needs. It removes FAT32's 4GB file size limit, allowing you to store individual files up to 16 exabytes in theory, making it suitable for video production, large software instalments, and media libraries.
The main advantage of exFAT lies in its universal compatibility. Unlike NTFS, which requires drivers on older Mac systems and some Linux distributions, exFAT works natively across Windows, macOS, and most modern devices without additional software. This makes it the practical choice for external drives, USB sticks, and memory cards that you'll use across multiple computers or cameras.
exFAT uses less processing power than NTFS, which matters for devices with limited resources. It also handles fragmentation better than FAT32, keeping performance stable as you repeatedly add and remove files. The trade-off is that exFAT lacks NTFS features like file permissions, encryption, and journalling, which means data corruption is more likely if your device loses power during a write operation.
Common gotchas: Some older devices and cameras may not recognise exFAT without firmware updates. Linux support varies depending on your distribution. If you need security features like encryption or detailed access controls, NTFS remains a better choice for internal drives.
Use exFAT when you need to share large files between Windows and Mac, or when working with external media that must function across multiple device types. Format internal drives as NTFS or the file system your operating system recommends.