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I see that the default allocation unit size is smaller for exFAT (2048 bytes) than for NTFS (4096 bytes) when formatting a disk on Windows 7 via Windows Explorer:

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Why is the default allocation unit size smaller (2048 bytes) for exFAT than for NTFS (4096 bytes)?

Franck Dernoncourt
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  • According to the Microsoft documentation for the `exFAT` it should be **128KB** for volume size _32 GB–256 TB_ capacity, on the Windows 7: [Default cluster size for NTFS, FAT, and exFAT](https://support.microsoft.com/en-us/topic/default-cluster-size-for-ntfs-fat-and-exfat-9772e6f1-e31a-00d7-e18f-73169155af95) – Jackdaw Jan 29 '22 at 07:02
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    *"Why is the default allocation unit size smaller (2048 bytes) for exFAT than for NTFS (4096 bytes)?"* -- You're not reading the screen correctly. I see an allocation size of 2MB (actually "2048 **kilo**bytes") in the exFAT window on the right side. So 2MB for exFAT is not smaller than 4KB for NTFS. – sawdust Jan 29 '22 at 07:18
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    @FranckDernoncourt: Check answers for this post: [Why is exFAT's default allocation size in Windows so high?](https://superuser.com/q/1151976/1266966). – Jackdaw Jan 29 '22 at 07:18

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