Delete all Files in SharePoint

How to delete every single document in every single site in a site collection? Here is how:

$site = Get-SPSite "http://yourwebapplication/sitecollection"
foreach ($web in $site.AllWebs) {
     
    $Libraries = $web.Lists | where {$_.BaseType -eq "DocumentLibrary"}
 
    foreach ($library in $Libraries) {
 
        Write-Output "Getting files from $($library.Title)"
        $Files = $library.Items | where {$_.FileSystemObjectType -eq "File"}
        foreach ($file in $Files) {
            Write-Output "Deleting file $($file.Name)..."
            $file.Delete()
         
        } # foreach file
     
    } # foreach library
     
} # foreach web

What if you want to delete only specific MS Office like docx or pptx?

$site = Get-SPSite "http://collaboration-dev/team"
foreach ($web in $site.AllWebs) {
     
    $Libraries = $web.Lists | where {$_.BaseType -eq "DocumentLibrary"}
 
    foreach ($library in $Libraries) {
 
        Write-Output "Getting files from $($library.Title)"
        $Files = $library.Items | where {$_.FileSystemObjectType -eq "File" -And ($_.File -Like "*.docx" -Or $_.File -Like "*.ppt" -Or $_.File -Like "*.pptx")}
        foreach ($file in $Files) {
            Write-Output "Deleting file $($file.Name)..."
            $file.Delete()
         
        } # foreach file
     
    } # foreach library
     
} # foreach web

Source:

• http://habaneroconsulting.com/insights/delete-sharepoint-files-with-powershell#.VhIRwEeUct0
• https://social.msdn.microsoft.com/Forums/sharepoint/en-US/e8a5a4d8-940b-4439-9591-4a6a58ff2746/how-to-remove-specific-file-types-ie-docx-from-multiple-specific-sharepoint-libaries-using