Hello everyone, I have a 2007 white macbook (C2D 2.1 GHz) running 10.5 leopard. It has a 120 GB HDD which has been neary full for quite a while now (not really an issue as I plan to purchase an external HDD anyway). It's also annoyingly slow (I use it for music, browsing, and office (word, excel, powerpoint) for mac 2008). I recently upgraded the RAM from 1 to 2 GB, I didn't notice any effect.. Now I have 2 questions.. 1. What is causing my macbook to be so slow? -Is it the nearly full HDD? -Still a lack of RAM? (even though 1-->2GB did not yield much effect) -The old CPU? -The fact that I am still running 10.5 leopard? 2. What do I do? Is there one upgrade that is going to make my macbook run significantly faster, and if there is, is it worth it? -Will a larger HDD (which would always be half empty) make it faster? -Even more RAM? -An OSX upgrade? -Would it be worth it to put an SSD in there (I'd go for a 120 Gb model) or will it be bottlenecked by CPU/RAM etc? Thanks in advance.