merging two folders windows 7

Hi

Can anyone suggest a better way merging two folders than using windows explorer?

Folder A contains some 2.2 TB of sub directories and assorted files, Mainly jpg's, html zip and larger videos  
Folder B has similar but will have duplicates and both folder will contain orphans

I need to merge the two but windows explorer take so long just to start the copy process even before the dialogue box appears asking for confirmation duplicate directory exists

All things being equal duplicate files should stay in there original location folder A should take precedence
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trevor1940Asked:
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NVITConnect With a Mentor Commented:
Another built-in tool is robocopy. It will skip duplicate files by default. If you want an exact copy of folder A, you can use the /MIR switch.
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☁ François Peroux ☁Infrastructure ConsultantCommented:
Hello,

You use DirSync (http://www.dirsyncpro.org/). It's a powerfull tool, free, and you'll be able to sync the two folders and avoid the copy of similar files. You'll save lot of time and it'll be faster than Windows explorer.

Let me know !
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TechieMDCommented:
I would recommend using TeraCopy. Much faster and more versatile/verbose than Windows Explorer's copy function
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mattayers80Commented:
You could use the Move-Item commandlet from Powershell.
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trevor1940Author Commented:
@François Peroux your suggestion failed to run with  this
Java error i raised new question to solve

@NVIT

attempted robocopy via gui it finished quicker than can read "robocopy"
now running via cmd prompt
I'm assuming this is because folder B is a mapped network drive to the NAS and  it couldn't be 'found'  in the cmd prompt i had to drag and drop the folder
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NVITCommented:
It shouldn't matter if network folder or mapped drive letter. As long as it can see the contents, it should work. Can you post your command line example? I'll look at it.
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trevor1940Author Commented:
@NVIT As requested

robocopy J:\FolderA\Sub Z:\FolderB\Sub /MOVE /S

Open in new window


I take this to move (Copy then delete)  everything from FolderA\Sub  to FolderB\Sub

@ François Peroux

I got this to run but it kept running out of memory
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NVITCommented:
Yes. /MOVE does what it says. I prefer to do a copy; Review the copy result; Then, a final DEL. That's just me.

> I'm assuming this is because folder B is a mapped network drive to the NAS and  it couldn't be 'found'  in the cmd prompt i had to drag and drop the folder
Can you clarify this issue?
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trevor1940Author Commented:
Yes  Folder B is the NAS

To answer your question
When typing in the cmd prompt I use the 'TAB' key to complete a folder name this did not work with robocopy but dragging the folder from explorer did  

Folder A is on an  external USB drive  connect to PC's USB 3 port

after running the command above it appears not everything was copied and some that files have haven't been deleted from Folder A  I'm deleting them now so can figure out what is left This has currently taken 4 hours
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trevor1940Author Commented:
Thanx for your help

I went with robocopy this seems most versatile and can be batch scripted  

DirSync  failed to load when I did get it to load it crashed running out of memory also it's terminology is not  clear

Didn't try TeraCopy as it needed instaling
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