Discontinued

USB 3.0 / eSATA 4-Bay 3.5in SATA III Hard Drive Enclosure w/ built-in HDD Fan & UASP – SATA 6Gbps

Add four 3.5" SATA III hard drives to your computer externally through USB 3.0 with UASP or eSATA

Product ID: S3540BU33E

2 stars (3 reviews) |
  • Supports SATA III (6 Gbps) and UASP (5 Gbps) for optimal performance
  • Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps) drives
  • Compatible with USB 3.0/2.0/1.1 (5 Gbps / 480 Mbps / 1.5 Mbps)

The S3540BU33E 4-Bay HDD enclosure lets you install four 3.5” SATA hard drives into an external enclosure, and connect to your computer through USB 3.0 or eSATA.

For fast performance and efficient data transfers, the enclosure supports SATA III transfer speeds -- up to 6 Gbps when connected through eSATA. The versatile enclosure can also be connected through USB 3.0, with support for UASP, performing up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller. See our UASP testing results below for further details.

The S3540BU33E is backed by a StarTech.com 2-year warranty and free lifetime technical support.

Improved Performance with UASP

UASP is supported in Windows 10/8, Mac OSX (10.8 or above), and Linux. In testing, UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance.

UASP Speed Diagram

At the same peak in testing UASP also shows an 80% reduction in required processor resources.

UASP Speed Diagram

Testing results were obtained using an Intel® Ivy Bridge system, a UASP-enabled StarTech.com Enclosure, and a SATA III solid state drive.

Applications

  • Use external hard drives for high-performance applications such video editing or photography
  • Create an external backup of important data
  • Build an external software RAID array
  • Expand the storage capacity of your desktop or laptop computer, through an external eSATA connection

The StarTech.com Advantage

  • Versatile connectivity options, through either USB or eSATA
  • Maximize performance, with file transfer speeds up to 6Gbps using eSATA
  • Keep your drives running cooler, with a built-in fan

Partner Numbers

  • UPC 065030858045

Compatibility

  • OS Independent logo
OS independent; No software or drivers required

Specifications

Warranty Information Warranty 2 Years
Connector(s) 4 - Drive Connectors SATA Data & Power Combo (7+15 pin)
1 - Host Connectors eSATA (7 pin, Data)
Environmental Operating Temperature 5°C to 35°C (41°F to 95°F)
Storage Temperature -20°C to 50°C (-4°F to 122°F)
Humidity 20%RH ~ 80%RH
Hardware Bus Type USB 3.0
Interface USB 3.0 & eSATA
Number of Drives 4
Drive Size 3.5in
Compatible Drive Types SATA
Drive Installation Fixed
Number of internal 3.5 inch bays 4
Fan(s) Yes
1 - Fans 80 mm
Chipset ID JMicron - JMS567
JMicron - JMB575
Indicators 1 - LED Indicators Power LED
4 - LED Indicators HDD Activity LEDs
Packaging Information Package Height 19.7 cm [7.8 in]
Package Length 28.2 cm [11.1 in]
Package Width 22.2 cm [8.7 in]
Shipping (Package) Weight 2.2 kg [4.9 lb]
Performance Maximum Data Transfer Rate 6 Gbps (eSATA)
5 Gbps (USB 3.0)
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
Type and Rate SATA III (6 Gbps)
Port Multiplier Yes
Hardware Raid Supported No
Max Drive Capacity Currently tested with up to 6TB 7200 RPM hard drives
Hot Swap Capability No
General Specifications Supports 2.5in Solid State Drives (SSD) and Hard Drives (HDD) using a 2.5in to 3.5in drive adapter such as 25SAT35HDD and 25SATSAS35
Physical Characteristics Product Length 20.0 cm [7.9 in]
Product Width 11.4 cm [4.5 in]
Product Height 14.3 cm [5.6 in]
Weight of Product 1.0 kg [2.3 lb]
Power Power Source AC Adapter Included
Input Voltage 100 - 240 AC
Input Current 2.5 A
Output Voltage 12V DC
Output Current 6.5 A
Power Consumption (In Watts) 78
Software OS Compatibility OS independent; No software or drivers required
What's in the Box 1 - Included in Package USB 3.0/eSATA 4-Bay 3.5" SATA hard drive enclosure
eSATA cable
USB 3.0 cable
universal power adapter (NA,UK,EU)
instruction manual

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Drivers/Downloads

Talk to an Advisor

We are always ready to assist you with any questions you may have.

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Manual(s):

Datasheet

Product Support

Talk to an Advisor

We are always ready to assist you with any questions you may have.

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Frequently Asked Questions

Troubleshooting

SATA hard drive controllers require a feature called port multiplier to read more than one hard drive per SATA or eSATA port. The port multiplier feature is not standard on many SATA hard drive controllers.

If your computer is only recognizing one of your hard drives, you need to plug the eSATA cable into a SATA controller that includes the port multiplier feature. If none of your current hard drive controllers include this feature, you can add a hard drive controller that does support port multiplier in any available expansion slot (for example, PCI, PCI-Express, PCMCIA, CardBus, or ExpressCard). StarTech.com has hard drive controllers available that support the port multiplier feature. To view the hard drive controllers, click here: http://startech.com/Cards-Adapters/HDD-Controllers/SATA-Cards/?filter_PORTMULTIPLIER=Yes.

If you have a hard drive controller card that does support the port multiplier feature but it is only reading one hard drive at a time, update the drivers of the hard drive controller. To find the most current StarTech.com drivers, click here: http://www.startech.com/Support.

When you troubleshoot issues with a hard drive enclosure, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Cables
  • Hard drives
  • Hard drive enclosure

To test your setup components, try the following:

  • Use the cables, hard drives, and hard drive enclosure in another setup to see if the problem is with the components or the setup.
  • Use a different cable, hard drive, and hard drive enclosure in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test the hard drive and hard drive enclosure, it is recommended that you do the following:

  • To check Disk Management, press the Windows key + R, type diskmgmt.msc, and press Enter. Check to see if your hard drive is listed.
  • If the hard drive is listed with unallocated space, the hard drive needs to be reformatted. Right-click unallocated and click New Simple Volume. Follow the on-screen instructions to complete the reformatting.​

Note: Formatting a hard drive erases all of the data on it. Make sure that you back up all of your data before you reformat the hard drive.​

  • If the hard drive is listed as healthy but does not have a drive letter, for example, C:, right-click healthy and click Change Drive Letter and Paths. Click Add, assign a drive letter, and click OK.

Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.

How To

To confirm that the Mac OS detects your USB device, complete the following:

  1. Click the Apple icon.
  2. Click About This Mac.
  3. Click More Info or System Report.
  4. Under the appropriate heading, confirm that your USB device is listed and that there isn't an error. For example, a network card would be under Ethernet Cards.

You may need to refresh the System Information page after you plug in your device.  To do so, press Command R with the System Information page open.

Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

Before You Buy

To determine if your hard drive will work in this enclosure, on the product page, click the Technical Specifications tab, and do the following:

  • Make sure that the enclosure supports the storage size of your hard drive. If the storage size of your hard drive is larger than what the enclosure was tested with, the hard drive will likely still work with the enclosure.
  • Confirm that your hard drive uses the same interface type as the enclosure. For example, IDE, SATA, or M.2.
  • Make sure that the enclosure supports the physical size of your hard drive, such as 2.5 inches or 3.5 inches.
  • Make sure that the enclosure supports the height of your hard drive. For example, 9 mm or 15 mm.
  • Verify that the power consumption of your hard drive doesn’t exceed the power output of the enclosure. If you’re using multiple hard drives, make sure that the combined power consumption of all of the hard drives doesn’t exceed the power output of the enclosure.

Hard Drives

Windows 10 

Before you can access a new or formatted drive in your operating system, you need to initialize it first and then create a partition on the drive. A partition defines an area of the drive to use for storing data. The partition uses a file system (for example, ex-FAT, NTFS, and so on).

Initialize a drive

Note: You typically only need to initialize a drive if the drive is new. If you cannot find an uninitialized drive in Disk Management, skip the following steps and try to partition your device.

  1. Press the Windows key + R, type compmgmt.msc, and click Run to open Computer Management.

  2. Navigate to Disk Management.

  3. When prompted to, initialize your disk(s). If you are running Windows® 7 or later and are using a drive larger than 2TB, initialize the disk(s) with GPT. If you are running an earlier version of Windows, initialize the disk(s) with MBR. For more information, visit the following FAQ: https://www.startech.com/support/faqs/technical-support?topic=hard-drives#mbr-vs-gpt.

  4. Click OK.

Create a partition in a drive

Note: The following steps create an NTFS partition that uses the entire drive space. To use a different file system, select a different option in step 6.

  1. Right-click Unallocated or RAW volume, and select New Simple Volume.

  2. In the New Partition Wizard, click Next.

  3. Select Primary partition.

  4. Leave the partition size set to default, and click Next.

  5. Assign a drive letter or leave it set to the default, and click Next.

  6. Enter the following settings to format the partition:

  • In the File System field, enter NTFS.
  • Set the Allocation unit size to Default.
  • In the Volume label field, enter <your name/reference>.
  • Select the Perform a quick format check box.
  • Clear the Enable file and folder compression check box.
  1. Click Next > Finish.

The new drive should appear in Windows Explorer.

Mac OS

Before you can access a new or formatted drive in your operating system, you need to initialize it first and then create a partition on the drive. A partition defines an area of the drive to use for storing data. The partition uses a file system (for example, HFS+, ex-FAT, NTFS, and so on).

Initialize a drive

Mac OSX detects a drive that needs to be initialized and automatically prompts you to initialize the drive. If you are prompted to initialize the drive, click Initialize. If you are not prompted to initialize the drive and you cannot find the drive in Finder, you will need to create a partition on the drive.

Create a partition on a drive

Note: The following steps create an HFS+ (Mac OS Extended (Journaled)) partition that uses the entire drive space.

To create a partition on a new drive, complete the following:

  1. Open Finder.

  2. Navigate to Applications and click Utilities.

  3. Open Disk Utility.

  4. Select the new drive and click the Partition tab.

  5. Click Options and verify that it is set to GUID Partition Table.

  6. Enter a name for the partition.

  7. Click Partition.

The drive should now be accessible in Finder.

For products related to this article, click here.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

Customer Reviews

(3 reviews)
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(1 Stars)

Turn it on, nothing happens.

By: gibletoid - 07/18/2021
Turn it off and back on, maybe it will detect, turn it off try again. 1 - 3 tries, every time. It also disconnects, and won't reconnect, so I am constantly turning it off and on. It has 4 identical WD RED NAS drives in perfect shape. Works great when it decides to connect.
| Helpful?
Dan, Customer Support on 20/07/2021 09:00:41
We apologize that this drive enclosure isn't working consistently for you. This is not expected behaviour for this enclosure. One of our technical advisors will be reaching out to offer assistance.
(1 Stars)

Constant disconnects

By: sbaker51 - 09/13/2021
This constantly disconnects whether connected via eSata, USB 2.0 or USB 3.0. Is there a firmware update available? It is populated with two identical WD Enterprise class 4.0 TB drives model # WD4000F9YZ. I've tried all of the above connectivity options and the problem remains. I've tried locating the drives on different 'shelves' inside the drive and using only a single drive in the enclosure and the disconnect problem remains. Any help would be sincerely appreciates as this has been a long-term issue making the enclosure unacceptably unreliable. The O/S is Windows 10 Pro 64-bit version 21H1 O/S build 19043.1165 with all the latest patches as of this date 09/13/21. Please help!
| Helpful?
Barrington, Customer Support on 14/09/2021 14:16:24
We are sorry to hear that you experienced difficulty with S3540BU33E. This is not expected behavior for our Hard Drive Enclosure. One of our technical advisors will be reaching to gather information about your setup, and see if we can help resolve the issue you are seeing.
(4 Stars)

Very impressive enclosure (mostly)

By: paddy - 10/19/2021
Bought this about 2.5 years ago, it was initially problematic but I was able to demonstrate to the startech technical support that it was defective and they shipped me a new one which works flawlessly. I did have to stop the disks spinning down though as it caused USB bus disconnects and as I'm using it as a raid 5 array I need it to be 100%. I am definitely very please with it as it's way cheaper than a NAS, I have it mounted on a Raspberry PI4B with UAS enabled and it's really fast, I have measured 30mb /sec write speeds on my 4 Toshiba P300 3TB array.
| Helpful?
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