Drobo 2 x Thunderbolt ports; second port for daisy chaining Thunderbolt devices (Mac OS X only) 1 x USB 3.0 port Mini 4-bay Storage Array DR-MINI-1A21

Pros: Very high availability and redundancy. Bad drive? No problem just pull one out and slap another one and you're done. You don't even need to press enter.

Not enough storage capacity? OK, just put another dive in and walk away. Ya, you're done now.

Cons: It's ext and not NTFS. NTFS is better and when using in conjunction with a Windows domain, certain security enhancements need to be disabled in order to provide functionality with the Drobo. :-(

Other Thoughts: The people complaining that this is just an external hard drive must be unaware that an external hard drive doesn't come with a remote-accessible, already deployed, pre-configured, secure Operating System with a built in RAID card, pre-configured RAID, and hot-swappable drive bays.

The drobo is a hot-swappable file server in a tiny box with the least amount of administration required for any storage product I have ever seen.

Pros: Fantastic product that i could not wait to purchase for several small business i support.

Cons: Oh..Wait..NO Network jack? Only thunderbolt? Let me go check my switch....Nope no thunderbolt ports there. So $700 for a external USB drive? I think not...must be for Apple fans they always seem to like to pay extra for less functionality.

Pros: * Outstanding redundancy and stability.
* "Reasonable" (not super fast) speed for a USB drive. That's really saying something considering you have RAID redundant drives.
* Can use SATA 5400RPM & 7200RPM hard drives as well as SSD.
* Very easy to use.

Cons: * Expensive if you don't need the drive redundancy and stability.
* I'm actually hard pressed to find another con.

Other Thoughts: The review from "Andrew" below is very misleading. On a DIY site like Newegg.com, you really need to do your research on the product for yourself and make sure that it meets your needs.

Pros: Drobo make an awesome product. I have 2 of them. One 8 bay and one 4 bay. Although I don't have this model, I thought this rating seemed very unfair.
Keep in mind that Drobo is not a usb hard drive array. Its is a hybrid RAID array. If you just want storage, this is not the way to go. The Drobo offers single or dual drive fault tolerance. This means if one of your hard drives fails, you will not lose data.

As far as taping hard drives together, yes if you just want storage this is a better way to go then drobo. HOWEVER, if you want your data to be protected against hard drive failure, this is the way to go.

**Drobo tech support is AMAZING!** Any time I have called with a question or submitted a support ticket online, they respond very fast. If you call, you get someone who speaks clear English.

Cons: Kind of spendy but you get what you pay for.

Other Thoughts: Know what you are looking for before you spend money on a product you do not need!

Pros: Looks nice.

Cons: For the low price of $650, you can buy 5 external drives (one of them mSATA with a mSATA to SATA adapter), a USB 3.0 HUB, and duct tape them together. OR, you can buy this Drobo, with no drives in it for the same price.

Other Thoughts: I have yet to see the point of owning a NAS (network attached storage) unit with no network interface. I mean hey, maybe you want to have all your external drives duct taped together in a pretty case, and you hate having money (daisy chain FTW!). If so, by all means, this DROBO is for you. Just don't forget, you are paying $650 for a USB hard drive case, you still need to put drives in it.