(Need Help) copied my external drive to my desktop win10 pc..


  1. Posts : 7
    Win10 PRO
       #1

    (Need Help) copied my external drive to my desktop win10 pc..


    ..and 10+GB is missing!? I just want everything to copy over.. Why is this happening? And each retry seems to be even less!
    Attached Thumbnails Attached Thumbnails (Need Help) copied my external drive to my desktop win10 pc..-screenshot-3-.png  
      My Computer


  2. Posts : 12,461
    Win10 Version 21H2 Pro and Home, Win11 Pro
       #2

    Keep in mind there's always a difference between the actual size of data and the size used on the HDD. It has to do with the cluster size chosen when formatting the HDD or a partition, the larger the cluster size and the smaller size of files will create 'slack' space [wasted space] and there's nothing that can be done about that. Regardless of the file size it will take 1 or more clusters for a file and if a file is too large it will take more clusters. Cannot put 2 files in the same cluster otherwise there will be data corruption and lose the file/s. If have a large number of small files a small cluster size choice would be okay but requires reformatting. The default for NTFS is 4096KB so if you have a 760Byte icon file it wastes quite a bit of space.
      My Computers


  3. Posts : 7
    Win10 PRO
    Thread Starter
       #3

    Berton said:
    Keep in mind there's always a difference between the actual size of data and the size used on the HDD. It has to do with the cluster size chosen when formatting the HDD or a partition, the larger the cluster size and the smaller size of files will create 'slack' space [wasted space] and there's nothing that can be done about that. Regardless of the file size it will take 1 or more clusters for a file and if a file is too large it will take more clusters. Cannot put 2 files in the same cluster otherwise there will be data corruption and lose the file/s. If have a large number of small files a small cluster size choice would be okay but requires reformatting. The default for NTFS is 4096KB so if you have a 760Byte icon file it wastes quite a bit of space.
    That's good info, but I don't think that explains why the total number of files and folders differ between the original and the 2 copies (see attachment)..

    Also, how can I easily compare the folders and spot the differences? I've got beyond compare 4 but I didn't figure out how to use it yet.. Is there an easier way?
      My Computer


  4. Posts : 5,478
    2004
       #4

    Perhaps you are not authorized to some of the files you are trying to copy?

    You could try to copy it with robocopy and it can generate a log file saying what if failed to copy.

    This command would copy drive D to a folder called "500GB drive backup" on your desktop and make a logfile called copylog.txt also on your desktop.

    Code:
    robocopy d:\ "%userprofile%\desktop\500GB drive backup" /copyall /e /r:0  /log:%userprofile%\desktop\copylog.txt
    You'll get a log something like this saying what it couldn't copy and why:
    Code:
    -------------------------------------------------------------------------------
       ROBOCOPY     ::     Robust File Copy for Windows                              
    -------------------------------------------------------------------------------
    
      Started : 29 December, 2015 11:35:17
       Source : d:\
         Dest : C:\Users\Hali\Desktop\500GB drive backup\
    
        Files : *.*
    	    
      Options : *.* /S /E /COPYALL /R:0 /W:30 
    
    ------------------------------------------------------------------------------
    
    	  New Dir          1	e:\
    	    New File  		 200.0 m	pagefile.sys
      0.0%
      0.5%
      1.0%
     99.5%
    100%  
    	  New Dir          0	e:\$RECYCLE.BIN\
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-1027584776-2358194297-2548917410-1001\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-2602478595-2806783560-1643973225-1001\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-3178208141-977810998-1597272411-1001\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-3244269357-763748866-2916749009-1009\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-3536341058-2341531926-3888982254-1001\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          1	e:\$RECYCLE.BIN\S-1-5-21-3536341058-2341531926-3888982254-500\
    	    New File  		     129	desktop.ini
      0%  
    100%  
    	  New Dir          0	e:\10\
    	  New Dir          3	e:\System Volume Information\
    	    New File  		      76	IndexerVolumeGuid
    2015/12/29 11:36:48 ERROR 5 (0x00000005) Copying File e:\System Volume Information\IndexerVolumeGuid
    Access is denied.
    
    
    	    New File  		   20480	tracking.log
    2015/12/29 11:36:48 ERROR 5 (0x00000005) Copying File e:\System Volume Information\tracking.log
    Access is denied.
    
    
    	    New File  		      12	WPSettings.dat
    2015/12/29 11:36:48 ERROR 5 (0x00000005) Copying File e:\System Volume Information\WPSettings.dat
    Access is denied.
    
      0%  
     30%  
     60%  
     91%  
    100%  
    
    ------------------------------------------------------------------------------
    
                   Total    Copied   Skipped  Mismatch    FAILED    Extras
        Dirs :        14        14         0         0         0         0
       Files :        17        14         0         0         3         0
       Bytes :  205.70 m  205.68 m         0         0    20.0 k         0
       Times :   0:01:30   0:00:00                       0:00:00   0:01:30
    
    
       Speed :           1191569016 Bytes/sec.
       Speed :            68182.126 MegaBytes/min.
       Ended : 29 December, 2015 11:36:48
      My Computer


  5. Posts : 1,778
    Windows 10 Pro,
       #5
      My Computer


  6. Posts : 17,640
    Windows 10 Pro
       #6

    Rocky said:
    For new SyncToy users, this excellent tutorial on our sister site the Seven Forums helps to get started with it: SyncToy - Windows 7 Help Forums
      My Computer


 

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