问如何在powershell中而不是在对象中返回搜索项的值？

EN

 #TFT  - This File Type
    #This bit find all hard drives and jump drives, lists files of the extension given
    #and returns that list of files.
    
    function tft($ext){
        $thisvalue = ($ext)
        $just_drives = @(get-psdrive |where root -Like '*`:`\'|where  Used* -gt ''|where name -NE 'c')
    
    if($ext -notlike '`*.*'){$ext='*.'+$ext}
    
    $a=foreach($jd in $just_drives){set-location -path $jd.Root;gci $ext -Recurse -Force -ErrorAction SilentlyContinue|where fullname -NotLike '*RECYCLE.BIN*'|ft fullname -autosize -HideTableHeaders
    
    
    }}
PS:>tft ttf

PS:>$a [enter]
    [truncated for space]
    E:\$WINDOWS.~BT\Windows\Boot\Fonts\chs_boot.ttf                                                                       
    E:\$WINDOWS.~BT\Windows\Boot\Fonts\cht_boot.ttf                                                                       
    E:\$WINDOWS.~BT\Windows\Boot\Fonts\jpn_boot.ttf                                                                       
    E:\$WINDOWS.~BT\Windows\Boot\Fonts\kor_boot.ttf                                                                       
    E:\$WINDOWS.~BT\Windows\Boot\Fonts\malgunn_boot.ttf                                                                                                                             
    ...
    H:\WINX21H2\efi\microsoft\boot\fonts\segoe_slboot.ttf  
    H:\WINX21H2\efi\microsoft\boot\fonts\wgl4_boot.ttf     
    H:\WINX21H2\sources\segoeui.ttf

    PS:> write-host $a -join(',')
        Microsoft.PowerShell.Commands.Internal.Format.FormatStartData,Microsoft.PowerShell.Commands.Internal.Format.GroupStartData,Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData,Microsoft.PowerShell.Commands.Internal.Format...
PS:> $a|copy-item d:\
copy : The input object cannot be bound to any parameters for the command either because the command does not take 
pipeline input or the input and its properties do not match any of the parameters that take pipeline input.
At line:1 char:4
+ $a|copy d:\
+    ~~~~~~~~
    + CategoryInfo          : InvalidArgument: (Microsoft.Power...FormatStartData:PSObject) [Copy-Item], ParameterBin 
   dingException
    + FullyQualifiedErrorId : InputObjectNotBound,Microsoft.PowerShell.Commands.CopyItemCommand....
... for 337K+ lines!!!