Thanks in advance for any help given. I switched everything over to apple last year. We have 3 apple tvs, 1 2011 Mac mini, the new iPad, and 2 iPhones. I have an airport extreme hooked up to my cable modem. We got sick of the time Warner cable service, so discontinued it and just bought all our tv shows through iTunes. With the "1080p" movies being offered we started purchasing those too. And, I've begun to rip my DVD's to my library too. My problem is I'm running out of storage space. Maybe not quickly, but it is insidiously persistent. I've already filled the 500gb internal drive and transferred that to a 2tb seagate FireWire external drive, and now that's almost full. I stream everything to the apple tvs and use the Mac mini for home sharing. I download all purchased content to the 2tb external drive to act as a back up incase the Internet / iTunes store is down. I'm not concerned about backing the library up to a 2nd drive incase of a drive failure because all the purchased content can be redownloaded. Ive done a fair amount of research on this forum and my initial idea was to just get the WD 6TB external drive and use whatever raid option maximizes space not redundancy. I was intrigued by NAS and being able to upgrade the drives as I go along, but disappointed when I found out that the ones that act as an iTunes server do not stream movies/tv shows, unless I read that wrong??? So is purchasing the largest external drive my best option? Are there any options beside that and investing in NAS which are more future proof? If I'm using the drive just to back up purchases and stream home sharing content is the FireWire connection necessary? Would USB 2.0 suffice? Any hard drive recommendations? Any help would be great because whatever I choose to do it will impact the next couple years of my iTunes library. Thanks.