Transcend JetFlash 710S

Yet another small and relatively fast USB Flash. Transcend JetFlash 710S (TS32GJF710S) 32 GB.
Test results are very different on different system and test versions.
CrystalDisk Mark 3
CrystalDisk Mark 5

Top Speed UHS-I U3 microSD 32 GB

Best microSD cards, that may be found today at stores is UHS-I with sequental read/write speed about 80-90 MB/s. To achive this read/write speed cardreaders must support at least UHS-I standard and be connected using fast interface like USB 3.0 or better. Use of old readers will reduce speed to about 20 MB/s. Use of USB 2.0 with UHS-I reader gives about 40 MB/s

microSDHC_SanDisk_32GB microSDHC_Transcend_32GB microSDHC_Kingston_32GB
Price 24.04.2016 37.29$ 22.64$ 18.03$
Sequential (QD=Q32) (MB/s) R 96.20 MB/s
W: 88.60 MB/s
R: 94.02 MB/s
W: 85.66 MB/s
R: 92.27 MB/s
W: 81.81 MB/s
Random  4KB (QD=32) (MB/s) R 8.63 MB/s
W: 3.22 MB/s
R:  10.19 MB/s
W: 1.69 MB/s
R:  11.76 MB/s
W: 1.47 MB/s
Sequental (MB/s) R: 97.31 MB/s
W: 88.49 MB/s
R:  94.81 MB/s
W: 87.46 MB/s
R:  91.23 MB/s
W: 86.20 MB/s
Random 4KB (MB/s) R: 8.63 MB/s
W: 3.27 MB/s
R:  9.98 MB/s
W: 1.45 MB/s
R:  10.37 MB/s
W: 1.44 MB/s


SDSDQXP-032G-G46A Sandisk Extreme PRO MicroSDHC (633x) UHS-I U3

TS32GUSDU3 Transcend ULTIMATE microSDHC 32GB (633x) UHS-I U3

SDCA3/32GB Kingston MicroSDHC 32GB UHS-I U3


Transcend TS-RDF9


CrystalDiskMark 5.1.2 x64

Additional reading for topic:


USB 3.0 SD Cardreaders

Quick comparision of couple USB 3.0 cardreaders with UHS-I support.


Transcend 300x SDHC UHS-1 U1

Read speed
Sequential Read (QD=Q32) (MB/s) 92.26 88.71 93.56 94.11
Random Read 4KB (QD=32) (MB/s) 6.58 9.39 10.52 10.50
Sequental Read (MB/s) 93.54 93.54 94.17 94.37
Random Read 4KB (MB/s) 6.38 8.92 10.11 10.04
Write Speed
Sequential Write (QD=Q32) (MB/s) 35.05 38.22 37.89 38.25
Random Write 4KB (QD=32) (MB/s) 0.98 1.00 0.78 1.03
Sequental Write (MB/s) 34.81 37.95 37.54 37.33
Random Write 4KB (MB/s) 0.82 0.68 0.88 0.66

Continue reading “USB 3.0 SD Cardreaders”

WD Red NAS Hard Drive 4TB

After 2.5 years of usage, my old backup drive (Seagate Barracuda Green 2TB) failed. Drive usage was minimal, but it was on 24/7. New disk decided to be NAS specialized 4.0 TB. Since I believe, it will be backup for this and next generation of home storage. I hope it will serve more than 2.5 year. So this time disk is WD Red NAS Hard Drive 4.0 TB WD40EFRX.

Before start using it as eSATA backup did some speed tests using USB 3.0 connection to Windows 7 PC.

CrystalDiskMark 3
WD40ERFX CrystalDiskMark 3

CrystalDiskMark 5
WD40ERFX CrystalDiskMark 5

HD Tune 5.60
WD40EFRX HD Tune 5.60

Continue reading “WD Red NAS Hard Drive 4TB”