I apologize in advance for what may seem stupid I just need some advice I do video and photo work and am working on a maxed out 17" MBP from 2009. I often move around huge files and was looking for a faster setup. Last fall I bought an OWC 2TB RAID 0 (with a Tempo Pro eSATA card). In addition to my other 1TB external and 500Gb system drive I have been wasting countless hours finding ways to backup everything. Since I have more data than a simple 2TB drive can backup, doing so across multiple HDDs has been a pain. I have a pile of HDDs with stuff on it and it gets very confusing and I haven't been on top of performing backups. In addition I've been running out of space and keep swapping data out, not good practice... The simple solution to have more space and up-to-date redundancy in case I lost a drive was to get a RAID 5. It would be large enough to not have to keep track of the many HDDs I have been using to incrementally back up my data. I could use it to place all my media and have plenty of room for time machine for my system. (I know RAID isn't a backup so I also plan to keep off site backups that I will update monthly) Now I'm getting the annoying "scared to use it" sickness. With 4-HDDs spinning in my RAID 5 I'm afraid of wear and tear when much of the time I'm only accessing small data like music and stuff. Should I limit use on the RAID 5 to increase it's lifespan? Should it only be for heavy lifting? Should I keep my entire existing setup (RAID 0 + other externals) and only use the RAID 5 for time machine? Does anyone have advice? I assume I'm being too paranoid, but I would hate to loose a drive in a few years when it would be hard to find a match (I only bought one extra).