Exfat Allocation Unit Size. [Résolu] filesystems Quelle taille d'unité d'allocation Supposedly, Win's default allocation unit size (AUS) for the NTFS format is 4Kb exFAT has a much larger per-cluster overhead than NTFS: 65 times larger, in fact, because NTFS just has one bit per cluster for the free space bitmap, while exFAT has one bit in the bitmap plus 4 bytes in each of two FATs.
What Is the Best exFAT Allocation Unit Size & How to Set in 2025 from www.easeus.com
If you're only going to be storing large files on a drive, feel free to use a larger allocation unit size --- it'll improve your storage efficiency. If you want to change cluster size to improve your disk performance or enhance the disk space utilization, you can try the following two methods to change allocation unit size for exFAT partition.
What Is the Best exFAT Allocation Unit Size & How to Set in 2025
format fs= exFAT unit=32k (the 32k allocation unit size can be changed to other also) When formatting a drive to exFAT via CMD, the allocation unit size typically ranges from 4 KB to 32 KB (or up to 64 KB for larger volumes), with larger sizes improving performance for big files but wasting space on small files. After going through the best exFAT allocation unit size, users may need to change it on their system based on the file size For NTFS drives, which are common on Windows, that will probably be 4096 bytes
Understanding the Max File Size on ExFAT A Comprehensive Guide MeasuringKnowHow. As a general rule of thumb, you can choose a larger allocation unit size for exFAT (e.g., 32KB, 64KB) if primarily working with large files like movies, or a smaller allocation unit size (e.g., 4KB, 8KB, 16KB) if most of your files are small documents. I don't know who at Microsoft decided that the default exFAT cluster size should be so large, or why, but I'll speculate
What's the Best exFAT Allocation Unit Size for PC & Mac?. Here are two methods you can use to modify the allocation unit size on exFAT: Method 1: Using EaseUS Partition Master Changing the allocation unit size is an important consideration when formatting a drive to ExFAT, as it determines how the file system divides the storage space.