Has anyone noticed FAT32 format option is gone in Windows?

Microsoft has not issued an official statement explaining why the FAT32 formatting option is unavailable for storage devices 32GB and larger but we’ve done some digging and came up with a possible answer.

On both Windows 10 and Windows 11, users are typically presented with formatting options for NTFS (New Technology File System) or exFAT (Extended File Allocation Table). The choice to format a drive as FAT32 is missing once the drive exceeds 32GB in capacity.

Since Microsoft has not clarified this change, it’s widely assumed that the decision was made to avoid problems caused by FAT32’s limitations—especially its inability to store files larger than 4GB. As file sizes have continued to grow over the years, this limitation has become more noticeable.

The FAT32 file system cannot handle single files larger than 4GB. This is due to its 32-bit file allocation table, which caps the maximum file size at 4,294,967,295 bytes. Regardless of the cluster size, FAT32 simply cannot address a file above that cluster size.

For users who need to store high-resolution videos, system backups, or other large files, switching to exFAT or NTFS is essential. NTFS, which is the default for most internal drives in Windows, offers better support for large files, access permissions, and journaling. ExFAT, on the other hand, was created as a lightweight, high-capacity alternative for external storage that’s compatible across multiple operating systems. But don’t format USB flash drives as NTFS as we’ve mentioned before.

We think Microsoft removed the FAT32 option for drives above 32GB to prevent user confusion and/or support issues. For example, trying to copy a 5GB video file to a FAT32 drive will result in a frustrating error message. By defaulting to exFAT, Windows helps users avoid this issue without needing to explain file system limits.

ExFAT supports significantly larger file sizes compared to FAT32. In theory, exFAT can handle files up to 16 exabytes (16 million terabytes), although real-world limits are much lower and depend on the device’s implementation. Even so, it’s more than sufficient for most consumer and professional use cases, from video production to large-scale backups.

While exFAT offers excellent cross-platform compatibility and large file support, users should be aware that some older operating systems or embedded devices might not support it natively.

Real Quick: A Brief History of File Systems

The concept of a file system—the method by which data is organized and stored on a storage device—has evolved steadily since the early days of computing.

General Motors needed a file system in the 1950s to help their early computers store and organize large amounts of business data—like payroll, inventory, and production schedules. Working with IBM, they developed one of the first operating systems (GM-NAA I/O) to manage these tasks. It allowed the computer to access and manage files on magnetic tape, making it easier to run multiple jobs and retrieve information efficiently. This basic file system helped move computing from scientific use into real-world business operations.

A few years later, more advanced systems like MIT’s Compatible Time-Sharing System (CTSS) introduced features like named files and user access control. By the 1970s, UNIX and Multics brought in hierarchical directory structures that closely resemble the file systems we use today.

Dumb Question: Why Did Microsoft Call It “FAT”?

The maximum file size for a single file on a FAT32 file system is not exactly 4 GB, but rather slightly less than that. FAT32 uses a 32-bit file allocation table, which means it can theoretically support file sizes up to 4,294,967,295 bytes (which is 4 GB minus 1 byte).

However, in practical terms, the maximum file size is usually constrained by the operating system or the software used to create or manipulate the file. Some operating systems or software may impose additional limitations, such as a maximum file size of 2 GB or 4 GB.

Furthermore, while FAT32 technically supports file sizes up to 4 GB minus 1 byte, it may not be the most efficient or reliable choice for handling very large files due to its limitations. For handling larger files, other file systems like NTFS (New Technology File System) or exFAT (Extended File Allocation Table) are typically more suitable.

Microsoft did not explicitly stop supporting FAT32 for formatting 64GB drives, but rather the limitations of the FAT32 file system itself led to practical considerations. FAT32 has inherent limitations in terms of maximum volume size and file size.

FAT32 has a maximum volume size limit of 32 GB when formatting drives in Windows. While there are ways to format larger drives with FAT32 (e.g., using third-party utilities or command-line tools), it’s not officially supported by Windows due to compatibility and stability concerns.

Given the limitations, Microsoft and other operating system developers have shifted towards file systems like NTFS (New Technology File System) and exFAT (Extended File Allocation Table) for handling larger drives and files. NTFS, in particular, provides better performance, security features, and support for larger volumes and files compared to FAT32.

Therefore, while FAT32 remains useful for smaller drives and compatibility with older systems and devices, its limitations make it less suitable for modern storage solutions, especially when dealing with larger capacities like 64GB or more.

Related: Why did Microsoft drop the feature to format 64GB flash drives as FAT32?

Microsoft has not made an official announcement on: Why Did Microsoft Drop Formatting FAT32 for 64GB and Above?

In both Windows 10 and Windows 11 the format option given by Windows is either NTFS (New Technology File System) or exFAT (Extended File System). The option to format FAT32 is no long available in Windows.

Without an official announcement from Microsoft we can only speculate the reason is do to single file sizes averaging a larger size as of 2023.

The largest single file size supported by the FAT32 file system is 4GB. This is due to the limitations of the file system’s design. FAT32 uses a 32-bit file allocation table, which means it can address up to 4,294,967,295 clusters. Since each cluster in FAT32 is typically 4KB in size, the maximum file size is limited to 4GB (4,294,967,295 clusters multiplied by 4KB per cluster).

If you need to store files larger than 4GB, you will need to use a different file system that supports larger file sizes, such as NTFS (New Technology File System), exFAT (Extended File Allocation Table), or others. NTFS, in particular, is commonly used in modern Windows operating systems and supports much larger file sizes, making it suitable for storing large files and operating system installations.

We speculate, to reduce customer inquiries or complaints to Microsoft they have eliminated the option of FAT32 to any device of 64GBs or larger in capacity. The reason is that a user will receive an error message from the device when an attempt to copy a single file of 4GBs or larger to a FAT32 device. To reduce the frequency of error messages, by formatting the device as exFAT will eliminate this error.

The ExFAT (Extended File Allocation Table) file system supports significantly larger file sizes compared to FAT32. The maximum file size supported by ExFAT is a staggering 16 exabytes (EB), which is equivalent to 16 million terabytes (TB) or 16 billion gigabytes (GB). This vast file size limit allows for storing extremely large files, such as high-resolution videos, large databases, or disk images.

ExFAT was specifically designed to overcome the limitations of FAT32, including the maximum file size restriction. It is commonly used in various devices and operating systems, including Windows, macOS, and some embedded systems, for handling large files and providing interoperability between different platforms.

It’s important to note that while ExFAT supports large file sizes, the actual maximum file size might be limited by the specific implementation or the capabilities of the storage medium itself.

If the above information was helpful, please consider looking at some advanced flash drives offered by Nexcopy. Advanced functions include USB copy protection, USB write protection, USB CD-ROM, and HIPAA compliant flash drives. These functions are done at the hardware level and are universal solutions.