Hello, How are you? So, I was wondering... I plan on having an external drive with my pictures and lightroom catalog, a local hard drive with a backup and then an offsite backup... My current computer is an iMac. Initially I was thinking about buying two external hard drives, firewire ones, daisy chain them and using one as my work drive and the second one as the backup. I would probably use a file sync software to keep the backup up to date and then a small 2.5 inch external usb drive to do a weekly offsite backup... This sounded right in my mind... but today, I started thinking about having just one Western Digital My Book Studio Edition II and the small offsite backup drive. Here is the WD: Subscribe to see EXIF info for this image (if available) My Book Studio II I would configure it to Raid 1 and just use that. It takes two drives and just mimics the contents on both drives, being in raid 1, so I would have an always up to date and automated local backup to prevent a single drive failure... Am I thinking right? If a drive fails, I just buy a new one, replace the failed one and the contents get updated on both drives again, right? Is this a good solution? What are the chances of both drives failing at once? And if the case fails, I can always remove the drives and access them over a docking station... What's your thoughts on this? Hope to ear from you. Best wishes!