Hi! I've been looking for a solution for what I'm doing here and gone through a good amount of threads on this sight but I'm still trying to figure it out. I have a pretty big aperture library on my late 2010 macbook air, over 200gb. I'm looking for the best solution to reduce the size of my library and back it up as well. I have considered 1. putting the whole library onto an external drive and starting a new one of my computer 2. putting the raw (master) images older than 3 months on an external and continuously syncing to put on new masters I'm willing to accept any solution. And to do either of those two, I'm not 100% sure what setup to have either. I've considered 1. (for #1 above) putting the library on two externals to keep it safe, and daisy chaining two external hard drives for time machine backup of the new library on my computer 2. (for #2 above) daisy chaining two external drives to keep the masters and having a single external drive to time machine backup everything continuously, including the non-referenced images/ the jpgs and newer than 3 months masters. I'm open to any suggestions. Sorry it's really confusing! One more question: My macbook air has an ssd so that's pretty fast but only 2gbs of non-upgradeable RAM. So it's not the fastest aperture machine, although it's decent. I have a 2007 metal iMac that I'm considering completely updating. It has a 2ghz processor and 1gb of ram, but if I updated the processor, put in around 8gb of ram, and completely factory restored it would it be better than my new air for editing pictures? Thanks!