Is it possible to delete 500,000 files in a folder at once without manually deleting?

[Randel1980]

So I have two folders located in drive D

 

Folder "A" contains 750,000 files.

Folder "B" contains 250,000 files.

 

If I want to delete all  500,000 files in "A" folder whose name do not match in folder "B". How do I do that?

[TempestCatto]

should just be able to right click the desired folder and click delete. Might take a hot minute though. 

 

Edit: Looks like I misunderstood what op wanted (again. Thank you to my poor English). 

[The Torrent]

6 minutes ago, Randel1980 said:

So I have two folders located in drive D

 

Folder "A" contains 750,000 files.

Folder "B" contains 250,000 files.

 

If I want to delete all files in "A" folder whose name do not match in folder "B". How do I do that?

Copy one of the contents of a folder into the other folder, and when it asks tell it to skip duplicate files. Then delete the old folder

[TetraSky]

4 minutes ago, The Torrent said:

Copy one of the contents of a folder into the other folder, and when it asks tell it to skip duplicate files. Then delete the old folder

This.

And if you want to keep them separated, after they've overwritten the files in Folder A, they will still be selected, so you can move them back to Folder B without any issues.

[Randel1980]

1 minute ago, The Torrent said:

Copy one of the contents of a folder into the other folder, and when it asks tell it to skip duplicate files. Then delete the old folder

Those files are irreplaceable, files from folder "A" are 1080P images. Files from folder "B" are 4K images. They just have identical names.

[minibois]

I think this is what you're looking for: https://stackoverflow.com/questions/43967926/compare-folder-contents-with-another-folder-and-delete

Since you want to delete the 'differences' between these two.

 

Be sure to first make a backup of the folders, in case anything goes wrong

[Oshino Shinobu]

Wrote a quick powershell script to do this. 

 

It will remove anything in Folder A that does not match in Folder B. It will not remove anything from folder B. Obviously, replace the paths with the ones you require. 

 

$FolderA = Get-childitem "D:\test\Folder1"
$FolderB = Get-childitem  "D:\test\Folder2"


$FilestoRemove = Compare-Object $FolderA $FolderB -Property BaseName -PassThru | Where-Object {$_.SideIndicator -eq '<='}
foreach ($file in $FilestoRemove) {
    Remove-Item -Path $file.FullName
}

I'd advise testing this first on some test folders to make sure it does what you want it to. Make a backup before using it if you can. 

 

Disclaimer here: I won't be held responsible if you use the script incorrectly or it otherwise removes files not as you intended. 

[Randel1980]

8 minutes ago, Oshino Shinobu said:

Wrote a quick powershell script to do this. 

 

It will remove anything in Folder A that does not match in Folder B. It will not remove anything from folder B. Obviously, replace the paths with the ones you require. 

 

$FolderA = Get-childitem "D:\test\Folder1"
$FolderB = Get-childitem  "D:\test\Folder2"


$FilestoRemove = Compare-Object $FolderA $FolderB -Property BaseName -PassThru | Where-Object {$_.SideIndicator -eq '<='}
foreach ($file in $FilestoRemove) {
    Remove-Item -Path $file.FullName
}

I'd advise testing this first on some test folders to make sure it does what you want it to. Make a backup before using it if you can. 

 

Disclaimer here: I won't be held responsible if you use the script incorrectly or it otherwise removes files not as you intended. 

You are amazing!!! This script works like a charm, it saves me a lot of time. Thank you.

[The Torrent]

2 hours ago, Randel1980 said:

Those files are irreplaceable, files from folder "A" are 1080P images. Files from folder "B" are 4K images. They just have identical names.

As long as they have same name it should still do it.

[TetraSky]

2 hours ago, Randel1980 said:

Those files are irreplaceable, files from folder "A" are 1080P images. Files from folder "B" are 4K images. They just have identical names.

Would've worked if they had the same name and same extension. 

Their size doesn't matter.

[The Torrent]

I still think my solution is better

[LogicalDrm]

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