title: How to use OSM offline maps saved on external SD?
body: <p>I currently try to develop an Android application that uses osm offline maps.
  I'd like to provide a large number of offline maps. That's why I decided to use the external SD-Card of my Galaxy S2 as folder of the tile source.</p>
  
  <p>Unfortunately, I'm not able to find the external sd-card within the ddms-file-explorer of eclipse.
  I only found the internal sd.</p>
  
  <p>I copied the osmdroid.zip to the external sd using the windows explorer, but my application couldn’t find it.
  I also wrote my own subversion of osmdroid as library to choose a specific path, but without results. Probably, I didn't try the appropriate path.</p>
  
  <p>I hope, that there is anybody out there, who can describe me, how to use the external sd as a storage for tiles.</p>