Are you thinking about installing an ultrafast RAID array, but you either have a laptop, don't want to open up your PC, and/or don't want to mess with drivers and complicated configurations? Monoprice has the answer to your needs in the form of this 4-bay 3.5" HDD USB 3.0/eSATA RAID Enclosure!
This RAID enclosure is perfect for increasing data throughput speed using the RAID 0 striping mode, for increasing data security using the RAID 1 mirror mode, gaining both speed and data security using the RAID 5 mode, or as an easy way to add external drives using the JBOD "just a bunch of drives" mode, which sees all installed discs as a single large volume. It supports four 3.5" SATA II (3.0 Gbps) drives up to 3TB each and has even been tested with the latest Hitachi 4TB drives for up to 16TB of storage.
This metal enclosure is completely self-contained, with everything needed to connect to a Windows, Mac, or Linux computer using a USB or eSATA cable (included), except the drives themselves, of course. It has a built-in 200 watt power supply, which provides 12 VDC and 5 VDC power levels from any 100 ~ 240 VAC power source, and an 80mm fan to keep things cool.
Drive installation is made easier with the ability to hot swap drives in and out of the system without turning off either the enclosure or the connected PC. Most importantly, it contains all the controllers, drivers, and software needed to operate and maintain the RAID array, making RAID installation and configuration as simple and easy as it can possibly be.