I bought a mac book pro last spring to process photos on. the Apple guys migrated my old files to the new laptop, but now the time machine says the library is 15.3GB, while the operating system on the laptop says it's 664 GB. When I try to copy the library to an external harddrive to reset the laptop, it says it cannot copy until it is downloaded, but gives me no option for this. I don't know what most of the stuff is in the library and so I'm stuck with a 2T harddrive, only half of which i can use. The part you can't see behond our photos is the Time Machine library listing, which is 15.3GB. Thoughts? TIA, CEB