






See Options
Need help? Ask our experts.
The enclosure supports both 2.5" and 3.5" form factor hard drives (HDD) and solid state drives (SSD), including SATA III (6 Gbps), hybrid drives, and solid state drives (SSD).
The S355BU33ERM 5-Bay Removable Hard Drive Enclosure can be connected to your laptop or desktop computer through either eSATA or USB 3.0.
Yes, the enclosure features a built-in cooling fan as well as solid aluminum drive trays, which help cool your drives and ensure maximum heat dissipation.
The S355BU33ERM 5-Bay Removable Hard Drive Enclosure is compatible with all of the leading operating systems, including Microsoft Windows, Apple OSX, Linux, and Google Chrome OS.
UASP, or USB Attached SCSI Protocol, is a computer protocol that is used to move data to and from USB storage devices such as hard drives and flash drives. It performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 when paired with a UASP-enabled host controller.
Review Summary
2020-11-08T19:00:00
Hi there, I just received a second unit to replace the first I thought was broken but only now I discovered the even the second doesn't work. I downloaded your software but is not compatible with MacOs 10.15.
roberto

2020-04-12T20:00:00
I purchased this 5 bay eSATA / USB hot swap enclosure in October 2019 and now April 2020 the enclosure keep failing. It is not longer recognized by my NAS which I use for backups. I have to cycle the power in order for the NAS to recognize it again. During backups, the enclosure fails. I replaced the hard drives and still the problem exists.
Paul2020

2019-09-07T20:00:00
This enclosure does not work with OSX 10.14 & up. It's going between the drives that won't mount or the MBP that won't sleep, shutdown or reboot. Take your pick, either way it's an expensive paperweight if you are running anything above 10.14...
JoBoPo

2019-06-04T20:00:00
I received this as a gift in december 2018. Since then the product worked flawlessly for a long period of time, until relatively recently. I started having issues when using it with a mac, and with nearly 2 TB of data across 5 HDD's all my drives became corrupted and wouldnt mount. Not understanding what was happening and being a fixer I tried everything I could think to get this back online, even going as far to hook up a different power supply. The dock will corrupt any mac drive that is connected for me, and in windows I get a read/write speed of 34MB/s both ways (USB 2.0 speed) I havent tried the esata I just prefer options and have only used USB 3.0. This unit has huge issues on a 3.1 port, will not consistently stay mounted, has a garbage read/write, the power cable failed, and Ive tried other USB cables without luck. A firmware update has not changed the behavior. Im not sure how the device went from issue free to borderline useless and a risk to my data in 6 months, but I refuse to even bother with a warranty. Startech makes good products and I trusted them but my unit has really made me feel like I might as well have thrown away $200+. Not looking for compensation, as Ill find a way to fix this myself. Just wish to make other buyers aware this thing may act up, and if it does dont bother troubleshooting just straight up return it. Overall build is solid otherwise. Its a product I was in love with until maybe a month ago.
Jasen

2019-05-10T20:00:00
I purchased a few years ago and used on mac Sierra perfectly for 4 independent drives. It has been really good and can't fault it. However Since update to mojave it just wont work even after reformatting drives. tech support says it should but no luck after trying everything as mentioned in other forums and Apple support. It wont even switch on on a windows 10 laptop with thunderbolt 2 (have tried it on 2 separate machines) or a mac mini with a thunderbolt 3 to 2 adapter cable. Seems to be a firmware issue. I have just purchased an OWC 2 bay Thunderbolt 2 caddy and works first time, so that's the solution i'm afraid! Hope that helps others considering this for a newer machine. Look elsewhere.
johnski

2019-01-14T19:00:00
Have owned this device for several years, and it just works. I'm extremely happy with this product.
Neve

2018-07-15T20:00:00
The enclosure works well. I get 252 MB/s transfer rate. And, it's very small. I only have one of these, but every one of my drive enclosures is made by StarTech. It's plastic, but I knew that when I purchased it. So, no loss in my review. The only thing I don't like is TRIM doesn't work with this enclosure.
awesome14

2018-05-23T20:00:00
Bought this enclosure to use as a RAID 0 large storage option. Unfortunately it is slower than the base drives by an order of magnitude (14-16MB per second throughput). do not purchase it if you are going to use it for RAID 0.
tomb

2018-05-17T20:00:00
I use it with MacOS 10.13.4 in RAID mode for TimeMachine Backup. Works great. Unfortunately no firmware updater for MacOS X available :-(
MattMerz

2018-05-10T20:00:00
I bought this last week. It's a nice case - compact, light, bus-powered, USB 3.0, takes 15mm 2.5" drives - exactly what I was wanting. Alas, it does not work with 5TB Seagate Barracuda 2.5" drives - and this was not obvious on the Amazon product page. I realise now that it has only been tested with 2TB drives. Gutted! Will there be a firmware update for it that will allow it to use 5TB drives?? I hope so!
Richard108

2017-12-15T19:00:00
I have two of these enclosures. They worked find with my Mac Pro late 2013 running Mac OSX Sierra. I upgraded to OSX High Sierra, and the eight drives in the two enclosures went MIA! Occasionally, a drive, or two or three, may mount, but after a few minutes it, or they, prematurely eject, hanging up my Mac Pro. One OWC and two Mobius enclosures work just fine with the Mac Pro and High Sierra, but not these StarTech 4-bay enclosures. No one seems to know why. If you plan on using this enclosure with a Mac Pro late 2013 running Mac OSX High Sierra, verify that the drives will mount reliably before you buy - or make sure the vendor will take back the enclosure if it, and the enclosed drives don't function as advertised.
aaprlore

2017-06-12T20:00:00
Bought this one just last week. It was the only one with JMicron 567 which has a 6Gbit eSATA bus. Performance difference between USB3 and and eSATA is negligeable. In contrast to the earlier model I bought, this one has proper hard drive cooling. It works seamlessley with Linux and Windows. Only issues I had: -Linux recognises drives in different order from numbering on enclosure. So I stuck a label with correct numbering on. -Allthough the trays have light-carriers alongside to cater for individual drive status leds, no leds are mounted in the backplane. So the only indicator are the drive activity leds on the front panel.
hainjedaf

2016-02-21T19:00:00
A really nice compact and very reserved design. This is the only drive enclosure I could find that fit 2.5" HDDs and SSDs, with SATA 3 and USB3. Very please with this, coupled with two WD red dives it very fast and runs very cool. The only improvement I would make would be to add a quick release/open latch rather than screw entry.
DrZiodberh

2014-10-29T20:00:00
very googd option fast and good Price but no software to manage hd password o r some thing like that.
tecmod

Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.
Browse our FAQ
USB 3.0
Jmicron - JMB575M + JMS567
SATA
Removable
2.5" / 63.50mm & 3.5" / 88.90mm
1 - 80 mm
USB 3.0 & eSATA
5
5
5
Yes
Currently tested with up to 6TB 7200 RPM hard drives
6 Gbps
Yes
No
USB 3.0 - 5 Gbit/s
eSATA (6 Gbps)
Yes
5x SATA Data & Power Combo (7+15 pin) Receptacle
1x USB Type-B (9 pin) USB 3.0 Female
1x eSATA (7 pin; Data) Female
OS independent; No software or drivers required
5x Drive Activity / Interface LED
1x Power LED
1x HDD Ready LED
1x USB / eSATA LED
10% to 90% non-condensing
5 to 55 deg. C / 41 to 131 deg. F
-40 to 70 deg. C / -40 to 158 deg. F
RoHS Compliant
CE
FC
8.5 x 11.1 x 5.9" / 215.9 x 281.94 x 149.86mm
141.2oz / 4003.02g
065030859295
Discover the power and versatility of the S355BU33ERM 5-Bay Removable Hard Drive Enclosure, a high-performance solution for accessing and managing your data across five individual 2.5" or 3.5" hard drives. This device offers seamless connectivity to your laptop or desktop computer through a single eSATA or USB port, ensuring efficient data transfers and fast performance.
Engineered to support full SATA III data transfer rates up to 6 Gbps when connected through eSATA, this enclosure is designed to optimize your data management tasks. It is compatible with 2.5in Solid State Drives (SSD) and Hard Drives (HDD) using a 2.5in to 3.5in drive adapter such as 25SAT35HDD and 25SATSAS35, offering you the flexibility to use both 2.5" and 3.5" form factor hard drives and solid state drives.
The S355BU33ERM 5-Bay Removable Hard Drive Enclosure features five individual drive bays with solid aluminum drive trays, ensuring the durability and longevity of your drives. It also includes a built-in cooling fan to maintain optimal drive performance and prevent overheating.
This device is compatible with USB 3.0 / 2.0 / 1.1 (5 Gbps / 480 Mbps / 1.5 Mbps) and SATA revision I/II/III (1.5/3.0/6.0 Gbps) drives. When connected through USB 3.0, it supports transfer speeds up to 5 Gbps and offers UASP support, performing up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller.
The S355BU33ERM 5-Bay Removable Hard Drive Enclosure supports the latest drive technologies including SATA III (6 Gbps), hybrid drives, and solid state drives (SSD), ensuring optimized performance from your external storage. It is compatible with all leading operating systems, including Microsoft Windows, Apple OSX, Linux, and Google Chrome OS, making it a versatile addition to your tech arsenal.
Experience improved performance with UASP, supported in Windows 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.
Whether you're looking to add a 5-bay hot-swap enclosure to a server or workstation computer, expand the storage capabilities of a small form factor/embedded system or laptop, or create additional backup/archive storage, the S355BU33ERM 5-Bay Removable Hard Drive Enclosure is the perfect solution. Its versatile connectivity options and high-speed performance make it an essential tool for efficient data management.
https://www.startech.com/en-us
800-265-1844