I currently have my photos organised by year and month, going back to 2006. Only the 2010 and 2011 are included in the LR catalogue. I usually keep the current and past year on my C drive, with older years held on an external drive (and bcked up to a second external drive). What will happen when I move the 2010 photos to the external HD? Will the LR catalogue still be able to find them or is there something I have to do to maintain the link between catalogue and original photo? Thanks.