To easily check the current allocation unit size of formatted NTFS volume, we can perform fsutil command to do it.
1. Launch Command Prompt at administrator.
2. Perform fsutil fsinfo ntfsinfo <Drive letter or CSV path> to check the "Bytes Per Cluster".
This volume was formatted as 4K
This volume was formatted as 64K
Or, we can perform Get-CimInstance Win32_Volume | FT Name,BlockSize -AutoSize to check it.
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