My Lightroom 5 will not open on a new External Hard Drive (EHD). I have thousands of photos on an old EHD with all photos in different folders named according to place and date. Each of these folders has its own Lightroom catalogue (the idea was to be able to take the photos in one folder with its own catalogue on a USB stick and work on my Mac without having to carry the EHD everywhere). As my old EHD is now full, I bought a much larger EHD (to serve me for many years to come) and copied all my photos in their own folders with each folder having its own catalogues into the new larger EHD. But Lightroom 5 will not open when I click on any Lightroom catalogue on the new larger EHD. It says it will not work with an external HD (even though it works with the old one) or it says it does not work with a network drive or it does not work with an ethernet connection (the new larger EHD has ethernet connections). Can some kind soul help me to get Lightroom 5 to open with each of the catalogues on my new larger EHD. The Ethernet connection can be converted to a USB with an adapter if needed, but having done that Lightroom 5 still does not work on the new EHD. So please HEEELP!