How to Change the Block Size of a Partition


Hard drives follow the rules stated by their file systems for file storage. Principally, the hard drives on your computer store files in blocks, which receive their definition according to the allocation unit size. The smaller the size, the less space on a hard drive gets lost due to using one allocation unit for a file less than half the size of the unit used. After using an allocation unit, it cannot be used to store another block from a file, meaning that the block remains in a fully occupied state regardless of how little the file occupies within the block.

  • Click your "Start" menu and click "Control Panel."

  • Click "System and Security" and click "Administrative Tools."

  • Double-click the "Computer Management" icon and navigate to "Disk Management" under "Storage."

  • Right-click the partition you would like to manage and click "Format."

  • Select a block size and the amount of the partition you would like to format. Follow the formatting wizard's instructions until you finish setting up your drive for a format.

Tips & Warnings

  • If you already formatted the partition before formatting again, you must right-click the partition and click "Delete Partition" or "Delete" and create it again. Upon creating it, you automatically get taken to the formatting wizard.

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