Need to create a script to copy the latest version of a folder to an external drive.

hi all,

im quite new powershell, trying create script run each sunday copy our directory external drive. 

$backup2 = "v:\xxxxx\xxxxxxx 2014-12-13 08;03;56 (full)\*"
$dest = "b:\"

copy-item -path $backup -destination $dest

only problem folder change name every week. 
how run without modifying script each week?

thanks in advance.

you go level , grab folder latest lastwritetime, should ensure ever newest folder - 

$path  =  (gci <path> | sort lastwritetime -descending | select -index 0).fullname

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