Transcend StoreJet 25S3 SSD/HDD Enclosure Review

I have been using Transcend StoreJet 25S3 2.5″ SSD/HDD Enclosure with Seagate 500GB 5400RPM HDD on Asus RT-AC68U for 2 years. Didn’t care to review it as 5400RPM HDD does not have the chance to push its limit until now. Yup, 480GB Kingston SSDNow UV400 SSD should be able to test its SuperSpeed USB 3.0 interface with UASP support. Is StoreJet 25S3 perfect as SSD enclosure? Let’s find out…


  • SuperSpeed USB 3.0 interface
  • Support UASP (USB Attached SCSI Protocol)
  • Easy plug-and-play installation
  • Lightweight and compact for ultra-portability
  • One Touch Auto-Backup button
  • Exclusive Transcend Elite data management software


Package Content & Design
Surprise! Yes, I keep most of the boxes of my products including Transcend StoreJet 25S3. It is still look as new even after 2 years. Basically, you will get StoreJet 25S3 enclosure, USB 3.0 cable, warranty card, quick start guide and lot of other Transcend product brochures there. As for build quality, it is well made thanks to aluminum housing with solid plastic (2 black parts). And it supports 2.5 inch HDD or SSD up to 9.5 mm in height. There is a blue LED light indicator on top right just beside the USB 3.0 wording. By the way, you will need to use screwdriver to remove the screws first in order to put SSD in. Not totally tool-free here. But not a deal breaker also unless you always need to chance hard drive. For me, I opened no more than 10 times in 2 years here.



One Touch Auto-Backup button is located just besides USB 3.0 port. You can use Transcend Elite software to enable express synchronization of files and folders to PC by just one touch. Will cover Transcend Elite software in the future.



  • Dimensions: 129mm x 79.9mm x 13mm (5.08″ x 3.15″ x 0.51″)
  • Weight: 86g (3.03 oz)
  • SATA Interface: SATA III 6Gb/s
  • Connection Interface: USB 3.0 (backwards compatible with USB 2.0)
  • Operating Voltage: USB DC 5V
  • Operating Temperature: 5°C (41°F) to 55°C (131°F)
  • Power Saving Mode: 10 mins
  • Certificates: CE, FCC, BSMI
  • Warranty: Two-year Warranty

Performance Result
I know that Transcend StoreJet 25S3 has no problem to provide maximum transfer rate on 5400RPM HDD. Yup, it sure does here. How about SSD performance? Is UASP (USB Attached SCSI Protocol) able to do so now? Let’s below benchmark results tell you…






Again, UASP sure does its job well here. It manages to push 480GB Kingston SSDNow UV400 SSD to 418 MB/s read and 415 MB/s write in CrystalDiskMark sequential Q32T1 test. Much better result in ATTO Disk Benchmark with 456 MB/s read and 442 MB/s write. AS SSD Benchmark result is almost the same as CrystalDiskMark. But I am getting much lower reading speed in Anvil’s Storage Utilities. No idea why… By the way, feel free to check out 480GB Kingston UV400 SSD Review to find out its full potential when connect directly through SATA connection.


  • Fast performance with UASP support
  • Excellent build quality
  • Stylish design
  • Ultra-portable
  • Workable without the casing


  • No tool-free design


Transcend StoreJet 25S3 is a solid SSD/HDD enclosure no doubt. Loaded with UASP support to ensure the fastest performance from your SSD. And maximum performance from normal HDD. More information can be found at Transcend Website. And buy yours at Amazon.


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