Not All File Systems Are the Same
Different operating systems use different file systems, each designed for specific needs. The file system determines how data is organized on disk, how much storage can be used, what file sizes are supported, and what features are available (like encryption or journaling).
Choosing the right file system matters. Formatting a USB drive with the wrong file system can limit its functionality or make it incompatible with certain devices.
FAT32 (File Allocation Table)
FAT32 is one of the oldest file systems still in use. It was introduced with Windows 95 and is still the default for many USB drives and SD cards because of its universal compatibility.
- Max file size: 4GB (this is why you can't copy a large video file to a FAT32 drive).
- Max volume size: 8TB (though most implementations limit it to 2TB).
- Pros: Works with virtually every operating system and device — Windows, macOS, Linux, game consoles, car stereos, smart TVs.
- Cons: No file permissions, no encryption, no journaling, 4GB file size limit.
FAT32 is great for portable storage where compatibility matters more than features.
NTFS (New Technology File System)
NTFS is the default file system for Windows. It was introduced with Windows NT and has been the standard for Windows systems ever since.
- Max file size: 16TB (theoretically 16EB in newer versions).
- Max volume size: 256TB.
- Pros: File permissions, encryption (EFS), compression, journaling (protects against corruption), disk quotas, hard links, and symbolic links.
- Cons: Not natively readable by macOS (read-only support) or Linux (requires additional drivers).
NTFS is the best choice for Windows system drives and any situation where you need advanced features.
ext4 (Fourth Extended File System)
ext4 is the default file system for most Linux distributions. It's the successor to ext3 and ext2, adding support for larger files, better performance, and journaling.
- Max file size: 16TB.
- Max volume size: 1EB (exabyte).
- Pros: Journaling, excellent performance, supports file permissions and encryption, well-tested and reliable.
- Cons: Not natively readable by Windows or macOS without third-party tools.
ext4 is the workhorse of the Linux world — it's fast, reliable, and handles everything from personal laptops to massive servers.
APFS (Apple File System)
APFS is Apple's modern file system, introduced in 2017. It replaced HFS+ as the default for macOS, iOS, and all Apple devices.
- Max file size: 8EB.
- Max volume size: 8EB.
- Pros: Optimized for flash storage (SSDs), snapshots (point-in-time backups), cloning (instant file copies), encryption, space sharing between volumes.
- Cons: Apple-only — not readable by Windows or Linux without conversion.
APFS is designed for the modern era of solid-state drives and is optimized for the features Apple devices need.