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Why Does File Size Changed After Being Copied From NTFS To HFS?

I want to use my external hard drive on my MacBook running both macOS and Windows, but I have no liking to any third-party software. So I copy files from the NTFS drive and make changes then switch to Windows and sync these changes to NTFS. But I find that the file size changes after the files are copied from NTFS drive to HFS partition, I wonder wha's going on?

Best Answered by

iBoysoft author Vain Rowe

Vain Rowe

Answered on Wednesday, November 22, 2023

Good day, my friend. Actually, the same file on two different volumes might use different disk space because a disk is divided into sectors that are certain minimum sizes, So, if disk-1 has 512-byte sectors and disk-2 has 1024-byte sectors, a file containing only 10 bytes will take up twice as much space on disk-2 as it does on disk-1, even if the files are identical.


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