Set full permission on files from the given folder +filter [optional]

SetFullPermissionOnFiles.ps1

$user = "test"
$remoteFiles = Get-ChildItem "C:\img" -Filter *.png

foreach ($file in $remoteFiles)
{    
    Write-Host Changing permission of $file.FullName
    #change permission
    $Acl = Get-Acl $file.FullName
    $Ar = New-Object System.Security.AccessControl.FileSystemAccessRule($user, "FullControl", "None", "None", "Allow")
    $Acl.SetAccessRule($Ar)
    Set-Acl $file.FullName $Acl
}