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April 1st, 2018, 12:15 PM
#1
Duplicate copies are not the same size
How come when I stick in my external hard drives in the same computer and do a direct copy the second copy is short Gigabyte size different by like 6 GB? All the programs look like they are copied though. The two drives are 500 GB. One is a normal mechanical hard drive and the other is a SSD drive.
Note: My questions may be to help others
Thanks, JB
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April 1st, 2018, 02:15 PM
#2
Is the copy version smaller?
Will update soon
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April 1st, 2018, 04:55 PM
#3
What do you mean by "direct copy"? Are you copying data files? What are you using to copy/compare files?
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April 1st, 2018, 06:00 PM
#4
Originally Posted by Midknyte
What do you mean by "direct copy"? Are you copying data files? What are you using to copy/compare files?
I think johnnyb was saying copying the files over to the new drive as a "straight copy", and that there's about a 6 gigabyte difference in total file size and the drives are the same GB size...
Will update soon
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April 1st, 2018, 08:39 PM
#5
So yes I plug in both drives and I take the original and do a select all, Copy, drag and drop onto the second drive. Then I clicked on the drive letter and all the folders look exact. When I click on properties of the drive is when I see the difference. The second backup copy is smaller.
Note: My questions may be to help others
Thanks, JB
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April 1st, 2018, 08:49 PM
#6
So yes I plug in both drives and I take the original and do a select all, Copy, drag and drop onto the second drive.
So that's just a normal copy.
I think you need to use a compare or sync program to see the differences.
If you just want to compare, you can try this: http://winmerge.org/
If you want to compare, and then sync, try this: https://www.freefilesync.org/
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April 1st, 2018, 09:19 PM
#7
Thanks. I actually have only 6 folders in both drives so I hit properties on all of the folders separately that they showed exact sizes of each other. Only when I hit properties of the hard drives themselves that they show a difference. So it was a 5.19 GB difference. See photo:Compare.JPG
Last edited by jonnyb; April 1st, 2018 at 09:37 PM.
Reason: Adding photo
Note: My questions may be to help others
Thanks, JB
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April 1st, 2018, 11:29 PM
#8
Then it's probably hidden files. Did you try the comparison apps I mentioned? They should be able to show all folders/files, including hidden ones.
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April 1st, 2018, 11:57 PM
#9
are the two drive even though same size, are they the same make and model?
Will update soon
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April 2nd, 2018, 12:29 PM
#10
One is a 512 SSD Western Digital and the mechanical drive is a Toshiba and is 500 GB. I ran Winmerge and it showed a recycle bin of 4.3 GB on the Toshiba. I ran the Winmerge and copied from one to the other and now they are about a gig different. Both are NTFS. I ran disk cleanup on both and the recycle bins say 0 bytes on both. Strange.
Note: My questions may be to help others
Thanks, JB
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April 2nd, 2018, 01:37 PM
#11
no boot manager on the original?
Will update soon
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April 2nd, 2018, 02:24 PM
#12
Do you see hidden folders in both? If all the visible files/folders match up, then it's probably something like hidden system folders.
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April 2nd, 2018, 03:14 PM
#13
Also check that System Restore is OFF for the external drives.
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April 3rd, 2018, 04:54 PM
#14
Originally Posted by Midknyte
Also check that System Restore is OFF for the external drives.
The original is only used for storage only. No boot manager. I have opened them up and disk cleanup and set them for no restore points. One is a SSD and one is a normal hard drive though. I don't know if that matters. I am not that worried about it because I saw all my files and I did the merge left to right and right to left. As long as all my stuff works like programs, music, pictures, docs, etc. then I am OK with it. Just wondered why the big difference. Thought I was missing something. They are just for back ups. The SSD that backed up the spinning hard drive is one that I keep in my computer bag for jobs. It's just a back up of my back up.
Just something new to learn for the future.
Last edited by jonnyb; April 3rd, 2018 at 04:56 PM.
Note: My questions may be to help others
Thanks, JB
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April 4th, 2018, 07:11 AM
#15
I'm not sure for this. can you please elaborate it with some example.
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