[SOLVED] Backup drive differences.

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zuv

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Oct 29, 2014
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I was moving some files from my backup drive to my mac (using a WD My Passport) and I noticed the amount of data was a few GB off (48.63 GB on my laptop, and 51.05 GB on my drive[same folder]) So i was checking each folder inside that folder and one of the problems I noticed was that one folder had 7,107 item in both the folder on my computer and hard drive.... but the difference was in the data (3,320,057,631 bytes on the drive vs 3,320,051,487 bytes [6.144 Kilobyte difference[) is this something that should not matter to me or might I have some corrupted files in the file on my computer...? (this is happening in a few sub-folders)

Not sure where the best place was to put this, I thought the Mac part in case it may be that my computer is just reading them different because it's a Mac or something.
 
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In all likelihood your external HD is probably formatted with ExFAT or FAT32, whilst your main HD is probably HFS+. I thought that perhaps one distinct possibility is that the .DS_Store files weren't copied; however, even accounting for .DS_Store files, in a 160 GB ~/, I found a total of 7.5 MB recursive and inclusive (as a sample comparative statistic). So, there's no way that .DS_Store files could account for the disparity. The best way to tell if there's a corrupt file is to compare their CRC32 or SHA checksum.
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itmoba

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In all likelihood your external HD is probably formatted with ExFAT or FAT32, whilst your main HD is probably HFS+. I thought that perhaps one distinct possibility is that the .DS_Store files weren't copied; however, even accounting for .DS_Store files, in a 160 GB ~/, I found a total of 7.5 MB recursive and inclusive (as a sample comparative statistic). So, there's no way that .DS_Store files could account for the disparity. The best way to tell if there's a corrupt file is to compare their CRC32 or SHA checksum.
 
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zuv

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Oct 29, 2014
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Actually .DS_Store does explain that issue. The weird thing is some folder's put a .DS_Store in them and some did not o_O ty though. And the rest or it was there were a couple files that had the same name and my computer decided to stop moving any files after them....
 
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