What is a file system?

A file system is the method of naming files and physically arranging them on a storage medium. It organizes files on a volume into directories that contain other directories (subdirectories) and individual files. A file system enables users to organize, store, and retrieve files on a storage medium such as a hard disk, CD-ROM, or DVD. It creates a structured representation of the relationships between data. Additionally, it provides security by controlling access to files and tracking ownership of each file. Lastly, it manages storage space on a volume by allocating space to files and reclaiming it when files are deleted. In essence, a file system establishes an environment where users can store and access their data. Some popular file systems include NTFS, FAT32, exFAT, and EXT2/3/4. Each file system has its unique features and advantages, so choosing the right one for your needs is essential.

For more information, click here to learn more about file systems.

Four File Systems: NTFS, FAT32, exFAT, and EXT2/3/4

The most common file systems are NTFS, FAT32, exFAT, and EXT 2/3/4.

    • NTFS (New Technology File System) is the most common file system on Windows computers. It's designed to support hibernation and encryption features, as well as handle very large files.
    • FAT32 (File Allocation Table 32) is an older file system that was originally designed for small floppy disks. It remains popular due to its high compatibility with various devices and operating systems.
    • exFAT (Extended File Allocation Table) is a file system introduced by Microsoft in 2006. This newer system doesn't have the limitations of FAT32, but it has less widespread support compared to NTFS or FAT32.
    • EXT (Extended File System) is a file system specifically designed for Linux operating systems. EXT2/3/4 offer good performance and security, but they are not compatible with Windows or macOS.

Click here for more information about exFAT, FAT32, and NTFS.

What is the best file system format for a bootable USB/external hard drive?

There are many different file systems in use today, each with its own pros and cons. exFAT is the best file system format for USB/external hard drives. It has several advantages over other file system formats.

NTFS FAT32 exFAT EXT2/3/4
Compatibility
  • Windows
  • Linux (read-only on some distros)
  • Mac OS (read-only)
  • Xbox One
  • Windows
  • Mac OS
  • Linux
  • Chrome OS
  • Android
  • Xbox 360/One
  • PS 3/4
  • Printers
  • Projectors
  • Windows
  • Mac OS 10.6.5 and later
  • Android
  • PS 4 (MBR format, not GUID)
  • Xbox One
  • Linux
  • Xbox 360/One
Volume size limit 8 PB 8 TB 128 PB

EXT2/3 - 32 TiB

EXT4 - 1 EiB

Single file size limit 16 EB 4 GB 28 PB

EXT2/3 - 2 TiB

EXT4 - 16 TiB

As you can see from the table above, exFAT has better compatibility than NTFS and EXT; and compared to FAT32, it can store larger files.

Advantages of exFAT:

First, exFAT has excellent compatibility with all major operating systems. It can be read and written to seamlessly on Windows, macOS, and Linux.

Second, it supports larger files and drives, making it ideal for storing large media files. With a bootable exFAT USB, you can manage up to 64 ZB (zettabytes) of data, which is a significant upgrade from FAT32.

Third, exFAT is easy to use, requiring no special drivers or software to access it from an operating system.

Finally, exFAT is very reliable; data corruption or other problems are rare.

For all these reasons, exFAT is the best file system format for USB drives and external hard disks.

How to Format (Bootable) USB/External Hard Drive to exFAT

Since exFAT is a cross-platform file system, it's the best file system format for USB/external hard drives. exFAT can be read by both Windows and Mac, and can be used as a bootable USB drive. It has better compatibility with newer operating systems and devices than FAT32. Given all the benefits of exFAT, you might want to format your USB drive as exFAT.

Tool Partition Master can help you format it easily! This powerful Windows partition manager allows you to resize, extend, split, format partitions, and also recover lost data from exFAT partitions. With its user-friendly interface, you can quickly format your USB drive to exFAT in just minutes.

Step 1: Launch AOMEI Partition Assistant, right-click the partition on your external hard drive/USB/SD card that you want to format and choose "Format".

Format External Hard Drive/USB/SD Card - 1

Step 2: Specify a new partition label, file system (NTFS/FAT32/EXT2/EXT3/EXT4/exFAT), and cluster size for the selected disk partition, then click OK.

Format External Hard Drive/USB/SD Card - 2

3. In the warning window, click Yes to continue.

Format External Hard Drive/USB/SD Card - 3

Step 4. Click on the “Run 1 Task” button on the top left to review the changes and then hit “Apply” to start formatting the external hard drive/USB/SD card.

Format External Hard Drive/USB/SD Card - 4

Conclusions

While there are various file systems to choose from, exFAT is the best file system format for a (bootable) USB or external hard drive. exFAT has several advantages over other formats, including better OS compatibility and larger maximum file sizes.

If you need to format your USB drive to exFAT, we recommend using the Partition Master tool. This software is designed to help you easily format partitions and is compatible with various operating systems. Partition Master also offers other features that make it a powerful tool for managing disk partitions, such as resizing, creating, formatting, and deleting partitions. If you're unsure if this software suits your needs, you can try the free version first before deciding on the full version.

Frequently Asked Questions

1. Is exFAT a reliable format?

exFAT is a reliable format for flash drives, memory cards, and other devices. It's compatible with Windows and Mac computers, Xbox One, and PS4. For Xbox 360 and PS3, exFAT is also a good choice.

2. Should I format my flash drive with the NTFS file system?

NTFS is not an ideal choice for USB drives. The main reason for using NTFS on these devices is to support files larger than 4 GB, but with modern hard drive developments, this is less of an issue. NTFS is also a more complex file system that can lead to increased wear on the drive. For this reason, it's generally recommended to format your USB drive or SD card with a simpler file system like FAT32 or exFAT.

What are the disadvantages of exFAT?

It is worth noting that exFAT also has its drawbacks.

    First, it is not as widely compatible as FAT32. Second, exFAT's cluster size is larger than that of FAT32. Last, when it comes to data protection, exFAT is not as robust as NTFS.

Overall, the advantages of exFAT usually outweigh the disadvantages.

< strong > 4. Why shouldn't I use exFAT?

There are a few reasons you might not want to use the exFAT file system. For one, it's not as efficient as other file systems when it comes to storing small files. A 500KB file, for example, will take up 12% more space on an exFAT drive than it would on an NTFS or FAT32 drive. Additionally, not all operating systems support exFAT drives.