I have a Philips HDR-612 with software version 3.0-something. I just bought a 250 GB drive and it appears that I have two options for hacking: I can add the 250 GB drive to my current 60 GB drive and have a total capacity of 310 GB. -OR- I can just replace the 60 GB drive with the new 250 GB drive and settle on a total capacity of 250 GB. To be honest, I really don't need 310 GB ... 250 GB should be sufficient. 250 GB would give me roughly 73 hours in BEST quality, 119 hours in HIGH, or 159 hours in MEDIUM. [I don't think I will ever use BASIC quality after this upgrade.] That really should be sufficient. Of course, adding instead of replacing would give me an additional 17 hours in BEST quality, an additional 28 hours or so in HIGH quality, or an additional 38 hours or so in MEDIUM quality. I probably won't need it ... but what the heck, why not. So, my question to you all is this: Is there any significant advantage to replacing a drive versus adding a drive? I mean in terms of: the ease of the hacking operation, likelihood for success, avoiding problems down the road, etc. Thanks in advance for any input!