exFAT vs NTFS: Overall Findings
The most important consideration when deciding between these two file systems is the systems to which you will attach the drive. For example, you may connect removable storage like USB sticks to systems running Windows, macOS, Linux, or even Android. In this case, the wider overall support of the exFAT filesystem will make your cross-platform work a lot easier. On the other hand, if you’re confident the drive will be used exclusively in Windows (as your computer’s internal SSD would likely be), go NTFS. The built-in security and resiliency features you get automatically make this a no-brainer. This can include media like external hard drives as well. But be careful if you try to use them with other systems, as all features (even as basic as write access) may not be supported.
Support: exFAT Is Supported Across More Systems
Microsoft created the NT file system, or NTFS, for its enterprise operating system Windows NT. It did so in order to address some of the existing limitations and restrictions of the FAT-based format used in consumer operating systems. These included support for larger file and directory sizes, improved security, and resilience features. Windows XP inherited this as its default filesystem format, and it has been very well integrated into versions of Windows ever since. On the other hand, Microsoft saw a need for another filesystem format that would resolve some of the major shortcomings of FAT (namely file size limits) for external media such as USB drives. So it created the Extensible File Allocation Table format, or exFAT, to fill this middle ground. The specification for exFAT is much more widely supported than NTFS, and in fact Microsoft even released the entire spec for it. This allows any hardware or software vendor to use it in their releases. As a result, exFAT is supported by all major desktop OSs, as well as many others on the desktop or mobile.
Storage Limit: exFAT Has More, But NTFS Still Provides Plenty
NTFS originally did away with one of the main limitations of Windows file systems for business: a 4 GB limit on file size. Drives (or volumes) with NTFS be can as large as 2 petabytes (PB), although certain limits within the Windows OS will only work with drives up to 16 TB in size. And since NTFS is for use primarily with Windows systems, this becomes an effective limit on the size of the drives you can use. exFAT, on the other hand, can support drives up to 128 PB in size, and (in theory at least) can store files up to 16 exabytes (EB). When it comes to managing files, however, NTFS has the edge. You can store over 4 billion files per directory in an NTFS drive, while exFAT can only handle 2.8 million.
Journaling: NTFS Has It out of the Box
NTFS uses a feature called journaling that records changes to data that haven’t been actually written to the disk yet. This helps in the event of a system crash, as the journal can be ‘replayed’ to get the drive back to a workable state. The preferred file systems for most recent versions of popular OSs use journaling, as helps keep users from ending up with a corrupted system after a crash. exFAT doesn’t support this feature out-of-the-box, although some add-ons can make it available (at the cost of compatibility). In fact, compared to its predecessor FAT, exFAT only uses a single table to record where the bits representing your data are stored. FAT used redundant tables, which at least gave you some additional hope to recover your data if something happens while the system is writing data to the drive.
Security Features: NTFS Has Many, but Only on Windows
As mentioned previously, NTFS includes a security scheme that aligns with the one in recent versions of Windows. Specifically, the ability to define who can use particular data, and what they can use it for (i.e. just read it, read or write it, or do both plus execute it) is built into NTFS. It also has the option to encrypt data automatically. Compare this to exFAT, which has no mechanism to track these permissions. This means drives formatted as exFAT will (depending on the operating system) either be restricted to only reading and writing data, or else the files they contain can be executed without restriction, which is a potential security risk.
NTFS or exFAT: The Final Verdict
When you have a new bit of storage you’re looking to set up, it may not be very clear on which of these formats you should use. Thankfully, there are a couple of ground rules you can follow to make your decision:
Use NTFS for internal drives: If this is an internal drive for a Windows machine, you should use NTFS. This is especially true if you’re planning on installing programs to it, as the security/permissions features of NTFS will help to protect your system against some malicious software.Use NTFS for external storage on Windows: If it’s external media (such as a portable hard drive or microSD card), and you’re planning on using that media only with Windows, you can again opt for NTFS. Reliability features such as journaling help to protect your data in case of a crash, and you may be able to take advantage of its built-in file compression to make the most of your space.Use exFAT for external storage on other OSs: If you’re planning to use your (presumably external) storage with other operating systems, you should opt for exFAT. It’s better supported much more widely across OSs like macOS, Linux, and Android. For example, macOS will read from NTFS file systems, but it will offer full read-write access to those with exFAT.
