DriveStation™ Quad USB 3.0 Hard Drive
Product Thumbnail
<p>HD-QLSU2R5 drives</p>
Product Thumbnail
HD-QLSU2R5 back
Product Thumbnail
eSATA bracket
Product Thumbnail

DriveStation™ Quad HD-QLSU2R5
Multi-Interface RAID Storage and Backup

DriveStation Quad is a high capacity, 4-drive, redundant storage and backup solutions for PC and Mac® computers with support for USB 2.0 and eSATA connections.

  • 4-Drive
  • USB 2.0 | eSATA
  • RAID 0/5/10


DriveStation Quad is an easy to use 4-drive USB and eSATA storage solution for PC and Mac computers. Instantly expand storage or schedule automatic back-ups with plug and play connectivity. With USB and eSATA connections and terabytes of storage, users can transfer and store tons of digital content swiftly and securely.

DriveStation Quad is equipped with two interfaces for convenience, compatibility and speed. USB 2.0 offers a standard connection for every PC and Mac computer, while eSATA provides high-speed data transfers, perfect for creative professionals.

With terabytes of storage and multiple connection methods, DriveStation Quad provides reliable, easy to use storage for your PC or Mac® computer. Quickly expand the capacity of your computer for your favorite music, photos, videos and more.

DriveStation Quad is perfect for backing up your important files. Disaster and hard drive failures can occur unexpectedly; don't leave your important files and treasured memories in the hands of chance. Schedule regular backups for your PC with Buffalo Backup Utility or use Time Machine for your Mac. Protect all of your data, down to the last byte.

DriveStation Quad provides users the option to easily protect their data using RAID redundancy.

  • RAID 0 combines both drives into a single array offering maximum storage capacity with no redundancy.
  • RAID 5 stripes the data across all four drives, interspersing parity data to provide an efficient blend of fault tolerance and storage capacity
  • RAID 10 mirrors two sets of hard drives and combines them into a single array, striping data across all mirrored sets for fault tolerance and increased performance.

DriveStation Quad comes with one license of NovaBACKUP® Business Essentials, an easy to use, complete backup solution for Windows® PCs, Windows® Servers, and SQL/Exchange Databases.

  • Restore any file, from a single view, regardless of when or where the files were backed up
  • Local and online backup
  • Free and premium off-site backup capabilities
  • Integration of online storage services for reliable compatibility
  • Disk imaging disaster recovery allows complete system imaging and complete system restore
  • System restore completed in matter of hours instead of days
  • Bare Metal Restore for quick reconstruction on blank system
  • Essential to business continuity
  • Each unit comes with 1 license of NovaBACKUP® Business Essentials

Buffalo Tools is a feature-rich suite of optional software included on many Buffalo DriveStation and MiniStation storage products. Any or all of the following components of Buffalo Tools may be installed on Windows PCs.

  • Buffalo's Backup Utility is an easy-to-use and fully featured backup software for Windows PCs and can be used to back up one or multiple computers with a single Buffalo external hard drive. 
  • ECO Manager is an energy efficiency tool used to conserve energy and reduce battery consumption by regulating the power usage of the hard drive, cutting power to the drive during extended periods of inactivity. 
  • RAMDISK is a simple utility that allows you to create a RAM disk on your Windows PC which creates a small, but extremely fast environment to work on files in. 
  • SecureLock software for Windows® provides complete control of the data encryption on your Buffalo external hard drive, providing password protection and software data encryption.


Internal Hard Drives
Number of Drives 4
Hard Drive Sizes 1 TB, 1.5 TB, 2 TB
Total Capacity 4 TB, 6 TB, 8 TB
Supported RAID Levels 5, 10
USB Interface
Standard Compliance USB 2.0
Connector Type A type
Number of Ports 1
Data Transfer Rates Max. 480 Mb/s (USB 2.0 Mode)
eSATA Interface
Standard Compliance eSATA
Number of Ports 1
Data Transfer Rates Max. 3.0 Gb/s
Dimensions (W x H x D) 5.9 x 6.1 x 9.2 in
Weight 12.5 lbs
Operating Environment (Fahrenheit) 41-95°
Client OS Support Windows® 8 (32-bit/64-bit), Windows® 7 (32-bit/64-bit), Windows Vista® (32-bit/64-bit), Windows® XP, Windows®2000, Windows Server® 2003 (32-bit)*, Windows Server® 2003 R2 (32-bit)*, Windows Server® 2008 (32-bit/64-bit)*, Windows Server® 2008 R2 (64-bit)*, Mac OS® X 10.4 - 10.7*
Power Consumption 86 W (Max)
Power Supply AC 100-240V 50/60 Hz
*Only basic external hard drive functionality is supported in these operating systems, some included utilities may not work.
Datasheets Product Datasheet »opens in new window
Comparison Chart View the comparison chart for this product »


Can I replace the hard drives in my DriveStation Quad by myself?

During the warranty period, please contact Buffalo Americas and we will replace any defective drives for you. The drives are easily replaced by sliding them into their bays behind the removable front panel; no tools are required. If maintaining your warranty is no longer a concern, most 7200 rpm SATA drives from reputable manufacturers will work fine in the DriveStation Quad; a screwdriver will be required to remove the hard drive tray and place it on the new drive. Because of thermal and power issues, the use of drives with speeds higher than 7200 rpm is not recommended.

Do I have data redundancy in RAID 0 mode?

No. While RAID 0 mode gives you more disk space, it will provide no data redundancy. Please, configure your DriveStation Quad for RAID 5 or RAID 10 to keep your data most secure.

Do I need to format the DriveStation Quad before I can use it?

All Buffalo DriveStation products come preformatted FAT32and are ready to use. It can also be reformatted to NTFS or HFS+ easily from any Windows® or Mac computer.

Is the DriveStation Quad compatible with Windows Server 2000, 2003 or 2008?

Yes. The DriveStation Quad works perfectly with Windows Server 2000, 2003 and 2008. The included NovaBACKUP Business Essentials is also compatible with Windows Server.

What capacity will the device have in different RAID modes?

The DriveStation Quad supports RAID0, RAID5 and RAID 10. In RAID 0, all hard drives are combined to provide maximum storage equivalent to the stated capacity of the device. However, in RAID 0 there is no data redundancy. RAID 5 provides data redundancy by using parity information on all drives and therefore provides 75% of the stated capacity (the equivalent of one hard drive is used for data redundancy). Finally, RAID 10 is available if you would like to combine the drives into a set of striped mirrors. In RAID 10, the volume is equal to 50% the advertised capacity.

Will the DriveStation Quad work on my Mac?

Yes, the DriveStation Quad will work perfectly on your Mac with OS X 10.4.11 and later. However, keep in mind that the DriveStation is pre-formatted with a FAT32 file system. Certain Mac features (TimeMachine) will require that you re-format the DriveStation with your Mac for the HFS+ file system which is very easy to do with any Mac computer.

Type File Post Date Version OS Support Notes
TXT 826.00 B
Download »
2011-04-12 1.10   Readme for Drive Navigator for HD-QLSU2/R5
PDF 23.96 MB
Download »
2010-12-16     HD-QLSU2 User Manual
Type File Post Date Version OS Support Notes
ZIP 267.89 MB
Serial Number Required »
2011-04-12 1.10 Windows, Mac DriveNavigator Installer for DriveStation Quad