Transcend StoreJet 25H3 1TB Portable Hard Drive Review: Page 6 of 7

Posted by Charles Gantt on Thursday, December 10, 2015 - 8:00am


To thoroughly test the StoreJet 25H3 1TB from Transcend, I will be running a series of benchmarks using three of the leading storage benchmarking programs. Due to the drives short USB 3.0 cable, I will be testing using one of the front USB 3.0 ports on my testing PC. While front USB 3.0 ports do tend to show slightly lower results, I feel this is a more accurate, real world test since that is where most users will plug their portable hard drives into. In general, I feel that real-world testing is much more informative than benchmarks that are ran to show raw, “as fast as possible” metrics. 

Testing Hardware

All SD benchmarks were ran on my main testing system in the lab which features the following hardware. 

  • Motherboard: Gigabyte G1 Sniper 5 
  • Processor: Intel i7 4790k at stock clock speeds
  • RAM: 16GB Corsair Dominator Platinum at stock clock speeds
  • GPU: MSI Geforce GTX 970
  • OS SSD: SanDisk Extreme II 480GB
  • PSU: BeQuiet DarkPower Pro 1000W
  • Case: Corsair Obsidian 800D
  • USB 3.0 Port Used: Top Left on Front I/O Panel on Chassis


Performance Test

The first test will be series of 50MB and 1GB writes to the drive using Crystal Disk Mark which will measure sequential and random read / write speeds. Crystal Disk Mark takes eight measurements: the read and write speeds in megabytes per second (MBps) for sequential, 512KB, random 4KB and 4KB parallel disk operations.


The first test was run using three 50MB samples. The drive proved to perform as expected for modern USB 3.0 speeds, and actually exceeded Transcend’s claim of 90MB/s performance.  Sequential read / write performance was around the 120MB/s range which is excellent for a small 2.5” spinner. 


The second CDM test was ran using three 1GB samples. Again it performed in the 120MB/s range, which is quite impressive given that a traditional hard drive is housed inside. At this point, I am extremely impressed! 


The second set of tests will be series of 512MB and 1GB writes to the drive using ATTO Disk Benchmark. This program is one of the leading storage benchmarking utilities in the industry, and is even used to quality test by some of the top manufacturers in the industry. ATTO Disk Benchmark will measure the StoreJet 25H3’s performance with various transfer sizes and test lengths for reads and writes. 


The first test was ran with writes 512MB long. While the drive was a little slow on the smaller transfer sizes, the average quickly picked up to the 120MB/s range once it surpassed 16KB. 


The second set of test with ATTO proved that this drive is a solid 120MB/s device. Again, anything smaller than 16KB proved to be a little slow, but things picked up around the 32KB transfer size. 


Just for kicks, I conducted a third benchmark run with ATTO, this time setting it to a total transfer length of 2GB. Again, the drive maxed out at about 120MB/s. Note that the drive letter changed from E to M because I ran this third test a few days later, and another drive had captured the E letter assignment. 

The final test was ran using Anvil Storage Utilities, an older, but still relevant performance measurement tool for traditional hard drives and solid state drives (SSD). This tool can monitor and test read and write speeds on hard drives while also providing information from the Windows Management Instrumentation (WMI) that provides basic information about the disk and its parameters. This includes partitions and volumes. Performance metrics are collected by random read and writes, I/O operations and integrity tests.

Performance numbers were a little lower on Anvil Storage Utilities, with the top read speed coming in at 114MB/s. Write speeds were around 112MB/s, giving the drive a total score of 261.15. While this score is useless, I plan on using it as a metric to compare future portable HDD-based storage drives. 

All in all, 120MB/s seems to be the overwhelming average for the StoreJet 25H3 1TB, and that is nothing to sneeze at. I am thoroughly impressed with the drive, and feel that it is more than capable of handling the average daily users file transfer needs.