Update index

cards.md

@@ -62,6 +62,7 @@ order: -1
 	<div class="index-box noborderbox" id="exchange-channels-card">
 		<h3>Exchange channels</h3>
 		<ul>
+			<li><a href="{{ 'external/exchange-channels/lft' | relative_url }}">LCSB file transfer (LFT) Quick Guide</a></li>
 			<li><a href="{{ 'external/exchange-channels/calendar' | relative_url }}">Sharing calendar in Microsoft Exchange</a></li>
 			<li><a href="{{ 'external/exchange-channels/asperaweb' | relative_url }}">AsperaWEB Quick Guide</a></li>
 			<li><a href="{{ 'external/exchange-channels/owncloud' | relative_url }}">Owncloud</a></li>