exFAT (Extended File Allocation Table) is a file system developed by Microsoft designed for flash drives and external storage devices. It supports large files over 4 GB and is compatible with various operating systems, including Windows and macOS. This makes it ideal for transferring files between different devices. Unlike older file systems like FAT32, exFAT allows for larger storage capacities and improved performance. It is commonly used in memory cards, USB drives, and external hard drives, making it a popular choice for users who need to store and share large amounts of data easily.