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Lexar Professional Workflow SR2 UHS-II SD Card Reader USB 3.0 Review

Lexar Professional Workflow SR2 UHS-II SD Card Reader with 32GB Card


The Lexar Professional Workflow SR2 is a UHS-II compatible Secure Digital memory card reader. It is similar in appearance to the Lexar SR1 card reader, but adds support for the latest UHS-II cards and offers transfer speed up to 300MB/s. It is also compatible with UHS-I and standard SD cards. The SR2 can be used as an independent card reader or mounted in the Lexar HR1 Professional Workflow 4-port hub.

Visually the SR2 offers an elegant design by incorporating a combination of textured and high-gloss surfaces. A single SD card slot resides on the front and accepts standard size SD cards (micro SD cards can be used with an adapter). The slot has a very close fit that helps guide the card as it is inserted to a depth of about 3/4 inches. A bright blue LED illuminates when a card is present and blinks while the card is accessed.

Lexar Professional Workflow SR2 UHS-II SD Card Reader Bottom

A rubber pad is located on the bottom of the reader to prevent it from sliding. A translucent grey cover is included to protect the front of the reader during transport or when not in use.

Lexar Professional Workflow Card Reader Back with USB 3.0 standard-B connector and cable

The full-size USB 3.0 standard-B connector on back of the case provides a solid connection. The connector is much more stable than the micro USB style connector commonly found on card readers.


The promise of UHS-II is unbridled speed, and the Lexar SR2 delivers. When used with UHS-II cards, the reader can provide up to three times the performance of UHS-I. The Lexar 2000x UHS-II 32GB card measured impressive 288.5 MB/s sequential read and 268.7 MB/s sequential write benchmarks. UHS-II cards from SanDisk, Panasonic and Toshiba also measured read speeds in excess of 260 MB/s.

The SR2's UHS-I performance also exceeded expectation with a majority of cards outperforming their rated speeds. For example, the SanDisk Extreme Pro 95MB/s UHS-I 64GB posted a 99.6MB/s read speed. The table below contains the read and write speeds of a variety of cards tested in the SR2 reader.

Reader: Lexar Professional Workflow SR2 UHS-II
Benchmark: CrystalDiskMark 3.0.3 x64
Program settings: 1000 MB, 5 passes, random test data
Operating system: Windows 10 Pro
Motherboard: Gigabyte GA-Z77X-UD3H
Processor: Intel Core i7-3770K @ 4.40GHz
RAM: 32GB DDR3 1600

Lexar Professional Workflow SR2 UHS-II
Card Benchmarks
Lexar Professional 2000x UHS-II Rev E 64GB301.532265.664
Lexar Professional 2000x UHS-II Rev E 32GB298.230262.768
Transcend Ultimate UHS-II U3 64GB296.963178.451
Transcend Ultimate UHS-II U3 32GB295.623182.663
ProGrade 250MB/s UHS-II V90 64GB291.879250.048
Lexar Professional 2000x UHS-II 64GB290.063267.017
Adata Premier One UHS-II V90 64GB290.063249.186
Lexar Professional 2000x UHS-II 32GB288.546268.693
Angelbird AV Pro V90 64GB287.281247.335
Transcend 700S UHS-II V90 64GB286.379190.287
Sony SF-G 300MB/s UHS-II 32GB280.593246.840
AData Premier One UHS-II V90 256GB279.769234.686
SanDisk Extreme Pro 300MB/s UHS-II 32GB276.596222.699
SanDisk Extreme Pro 300MB/s UHS-II 128GB274.317223.173
Sony M Series UHS-II 128GB273.45893.807
Sony SF-G 300MB/s UHS-II 128GB272.818245.367
Lexar Professional 2000x UHS-II Rev B 128GB272.747221.921
Sony M Series UHS-II 32GB271.969114.050
Lexar Professional 1800x microSD UHS-II 64GB271.969224.390
Sony SF-G 300MB/s UHS-II 64GB271.793246.029
Lexar Professional 1800x microSD UHS-II 32GB270.461219.873
Hoodman Steel UHS-II 64GB270.078179.489
Delkin Power 2000x UHS-II V90 64GB269.522215.446
Delkin 1900x UHS-II 32GB269.45351.123
SanDisk Extreme Pro 280MB/s UHS-II 32GB268.969225.403
Sony M Series UHS-II 64GB268.96999.091
Integral UltimaPro X2 UHS-II V90 64GB268.866237.530
Delkin Power UHS-II V90 128GB268.178214.433
Sony Tough UHS-II 64GB267.870240.692
Toshiba Exceria Pro N502 64GB267.528241.635
SanDisk Extreme Pro 300MB/s UHS-II 64GB267.119217.209
Lexar Professional 1800x microSD UHS-II 128GB266.339107.348
Panasonic MicroP2 UHS-II 32GB265.53049.823
Verbatim Pro II Plus UHS-II V90 64GB263.826224.944
Delkin Prime UHS-II V60 64GB263.03294.136
SanDisk Extreme Pro UHS-II 275MB/s microSDXC 64GB262.867106.282
Toshiba Exceria Pro UHS-II 32GB261.295229.900
Lexar Professional 1000x UHS-II Rev C 64GB166.335110.749
ProGrade 200MB/s UHS-II V60 64GB166.151107.801
Angelbird AV Pro V60 64GB165.026108.492
Lexar Professional 1000x UHS-II 256GB155.46088.086
Lexar Professional 1000x UHS-II Rev C 128GB154.70386.083
Lexar Professional 1000x UHS-II 32GB153.93187.229
Lexar Professional 1000x UHS-II Rev B 32GB153.61584.864
Lexar Professional 1000x microSD UHS-II 32GB152.03452.870
Lexar Professional 1000x UHS-II 128GB151.85786.473
Lexar Professional 1000x UHS-II 64GB151.66084.304
Lexar Professional 1000x UHS-II microSD 64GB150.76653.103
Lexar Professional 1000x UHS-II microSD 128GB150.09758.501
Kingston Canvas Go! V30 256GB99.64680.753
AgfaPhoto Professional 64GB99.63790.951
Kingston Canvas React V30 128GB99.63781.799
Kingston Canvas React V30 256GB99.63781.153
Patriot EP Series V30 A1 microSDXC 128GB99.58081.665
Kingston Canvas React V30 64GB99.58081.779
SanDisk Extreme Pro 95MB/s 64GB99.56191.006
SanDisk Extreme Plus 95/90 MB/s microSD 64GB99.56191.419
SanDisk Extreme 90MB/s U3 V30 32GB99.55253.504
SanDisk Extreme 90MB/s U3 V30 microSDXC 64GB99.55270.735
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 64GB99.55290.943
SanDisk Extreme 90MB/s U3 64GB99.55250.138
SanDisk Extreme Plus 90MB/s U3 V30 64GB99.55265.832
SanDisk Extreme Plus 90MB/s U3 V30 32GB99.55266.640
SanDisk Extreme 90MB/s U3 V30 128GB99.55266.010
SanDisk Extreme Pro 95MB/s microSDXC 64GB99.55291.419
SanDisk Extreme 90MB/s microSDHC 32GB99.55248.997
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDHC 32GB99.55290.512
SanDisk Extreme 90MB/s U3 V30 microSDHC 32GB99.55269.636
SanDisk Extreme Pro 95MB/s 128GB99.55291.204
SanDisk Extreme 90MB/s U3 V30 256GB99.55264.968
SanDisk Extreme 90MB/s U3 V30 microSDXC 128GB99.55263.739
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 128GB99.55290.030
SanDisk Extreme 90MB/s U3 32GB99.55249.340
SanDisk Extreme 90MB/s U3 V30 64GB99.55254.325
SanDisk Extreme Pro 95MB/s U3 32GB99.54290.551
SanDisk Extreme Pro 95MB/s 32GB99.54292.655
SanDisk Extreme Pro 95MB/s microSDHC 32GB99.54291.054
SanDisk Extreme Plus 80MB/s microSD 32GB99.54265.622
SanDisk Extreme Plus 95/90 MB/s microSD 32GB99.53390.888
SanDisk Extreme Plus 100MB/s A1 microSDXC 64GB99.53390.566
SanDisk Extreme Plus 100MB/s A1 microSDXC 128GB99.53390.967
SanDisk Extreme 100MB/s A1 microSDXC 64GB99.53372.606
SanDisk Extreme Pro 95MB/s U3 V30 256GB99.52390.574
SanDisk Ultra 80MB/s microSD 64GB99.51420.330
SanDisk Extreme Pro 95MB/s U3 V30 128GB99.50490.441
SanDisk Extreme Pro 95MB/s 256GB99.50490.130
SanDisk Extreme Plus 100MB/s A1 microSDHC 32GB99.49591.292
SanDisk Ultra Plus V10 A1 microSDXC 128GB99.49561.995
SanDisk Extreme Pro 95MB/s U3 V30 32GB99.49590.770
SanDisk Extreme 100MB/s A1 microSDHC 32GB99.48570.845
SanDisk Extreme 100MB/s A1 microSDXC 128GB99.48564.310
SanDisk Extreme Pro 95MB/s U3 V30 64GB99.48590.208
SanDisk Ultra 80MB/s microSD 128GB99.45756.536
SanDisk Extreme 150MB/s 128GB99.26987.813
SanDisk Extreme V30 A2 microSDXC 256GB99.25987.593
SanDisk Extreme 150MB/s 64GB99.24166.211
SanDisk Extreme Pro 170MB/s 128GB99.24187.703
SanDisk Extreme 150MB 256GB99.24188.071
SanDisk Extreme V30 A2 microSDXC 400GB99.24186.975
Samsung PRO Select microSDXC 64GB99.23187.265
SanDisk Extreme Plus V30 A2 microSDXC 128GB99.21286.947
SanDisk Extreme Pro 170MB/s 64GB99.19487.171
SanDisk Extreme Pro 170MB/s 256GB99.15687.535
SanDisk Extreme Plus 150MB/s 128GB99.15687.055
SanDisk Extreme Plus 150MB/s 64GB99.10987.019
Patriot EP Series microSDXC 64GB98.52376.706
Kingston Class 10 UHS-I 64GB98.52370.745
Kingston U3 (90/80) microSD 64GB98.52383.346
Transcend 95/85 MB/s U3 32GB98.51389.976
Kingston U3 90/80 MB/s 64GB98.51384.706
Panasonic Gold 95/90 64GB98.51386.232
Polaroid Extreme Performance 95/90 MB/s 64GB98.51382.507
Kingston U3 90/80 MB/s 128GB98.50481.462
Kingston U3 90/80 MB/s 256GB98.49587.012
Kingston Canvas Go! V30 64GB98.48680.759
Patriot EP PRO microSDXC 64GB98.45876.639
Verbatim Pro Plus V30 64GB98.40280.258
Sony Ultra-High Durability Professional 64GB98.36576.432
PNY Pro Elite 64GB98.20086.253
Toshiba Exceria UHS-I Class 3 64GB98.08059.843
Toshiba Exceria UHS-I Class 3 32GB98.08061.299
Toshiba Exceria Type 1 32GB98.06286.824
Toshiba Exceria Type 2 32GB98.06265.651
Toshiba Exceria Pro N401 95/75 MB/s 128GB97.93475.874
PNY Pro Elite microSDXC 64GB97.93476.483
Samsung PRO U3 32GB97.89779.734
Samsung PRO Plus 64GB97.88887.938
Samsung PRO Plus 32GB97.86186.760
Samsung PRO U3 64GB97.82478.751
Samsung PRO Select microSDXC 64GB97.82486.896
Samsung PRO microSDXC 64GB97.78878.793
Samsung PRO Plus microSDXC 64GB97.76987.381
Delkin Black 32GB97.64281.608
Delkin Elite 633x 32GB97.63381.984
Toshiba Exceria Pro N401 95/75 MB/s 128GB97.53376.033
SanDisk Extreme Plus 80MB/s 32GB97.50659.953
Patriot EP Pro 90MB/s 32GB97.42448.131
Samsung EVO Select microSDXC 64GB97.36125.626
Lexar Professional 633x microSDXC 64GB96.86628.317
Lexar Professional 633x U1 64GB96.86629.105
Lexar Professional 633x U1 32GB96.85722.438
PNY Elite Performance U3 128GB96.78668.516
Transcend 95/60 MB/s U3 128GB96.75968.588
Transcend R95 W85 U3 64GB96.75087.462
Transcend 95/60 MB/s U3 64GB96.75065.836
Lexar Professional 633x U3 256GB96.74168.913
Transcend 600x 64GB96.74167.350
PNY Elite Performance U1 64GB96.73266.303
Silicon Power Superior Pro 128GB96.73266.665
Transcend 600x 128GB96.73269.122
Transcend 633x microSDHC 32GB96.73287.946
Lexar Professional 633x U1 128GB96.71428.593
PNY Turbo Performance U3 microSD 32GB96.70557.576
PNY Elite Performance U1 32GB96.70538.377
Kingston U3 90/80 MB/s 32GB96.70587.440
PNY Elite-X microSDXC 64GB96.70571.614
PNY Elite microSDXC 128GB96.70528.624
PNY Elite Performance U3 256GB96.70554.836
Transcend 600x 32GB96.67939.355
Transcend 500S 64GB Card 296.67967.541
Sony 95MB/s U3 32GB96.67987.946
Gobe Magic 104MB/s 32GB96.67087.909
PNY Elite-X microSDHC 32GB96.66176.954
Gobe Magic 104MB/s 64GB96.65287.652
Transcend Ultimate 633x microSD 64GB96.65287.200
Transcend 500S V30 64GB96.64368.271
Sony 94MB/s 32GB96.64366.729
Transcend 95/60 MB/s U3 256GB96.63468.741
Patriot EP Pro 128GB96.63442.577
Sony 95MB/s U3 64GB96.61687.549
Lexar Professional 600x 32GB96.57248.233
Transcend 500S V30 128GB96.57268.316
PNY Elite Performance U3 64GB96.53668.449
Patriot EP Pro 90MB/s 64GB96.44741.375
Panasonic Gold Series 32GB96.40343.409
Kingston Ultimate 32GB96.11146.996
Lexar Professional 633x U3 32GB96.09448.633
SanDisk Extreme Plus 90MB/s 32GB96.06772.196
Lexar Professional 600x 64GB96.04167.633
PNY Turbo Performance microSDXC 64GB95.97957.719
Samsung PRO 32GB95.84882.364
Lexar Professional 633x U3 128GB95.50768.351
Lexar Professional 633x U3 64GB95.44768.926
Kingston Canvas Select 64GB95.12623.596
Samsung PRO 64GB95.08382.254
Samsung PRO Plus microSDXC 128GB95.05740.561
SanDisk Extreme Plus 80MB/s 64GB95.05760.925
Samsung PRO Plus microSDXC 128GB94.92883.953
Samsung PRO Select microSDXC 128GB94.88583.900
Samsung EVO Select microSDXC 256GB94.21287.265
SanDisk Extreme Plus 90MB/s 64GB94.18672.067
Toshiba FlashAir W-04 64GB93.97575.032
SanDisk Extreme 90MB/s microSDXC 64GB92.62243.600
SanDisk Ultra 90MB/s microSD 200GB90.77819.422
Lexar Professional 633x microSDXC 200GB90.76235.425
Kingston Class 10 256GB90.52747.473
Samsung EVO Select microSDXC 128GB87.80617.570
Lexar Professional 633x microSDXC 128GB86.09022.394
SanDisk Extreme 90MB/s U3 128GB85.31978.305
SanDisk Extreme 80MB/s 128GB84.46780.136
Samsung EVO Plus 128GB microSDXC84.42622.600
SanDisk Ultra 80MB/s microSD 32GB82.52017.065
SanDisk Extreme 80MB/s 256GB81.51979.001
SanDisk Extreme 60MB/s 32GB75.08154.819
SanDisk Extreme U3 microSD 32GB74.80254.053
Lexar Professional 400x 32GB71.87443.553
SanDisk Extreme 60MB/s 64GB71.29352.356
SanDisk Extreme U3 microSD 64GB68.36555.669
PNY Elite microSDXC 64GB63.19832.483
SanDisk Ultra 40MB/s 64GB47.75415.629
SanDisk Ultra 40MB/s 32GB Card 147.75244.673
SanDisk Ultra microSD 32GB47.75215.131
SanDisk Ultra microSD 64GB47.75215.588
SanDisk Extreme 45MB/s 32GB47.74944.556
Samsung EVO microSDXC 64GB47.68623.397
Samsung EVO 64GB47.67623.920
Samsung EVO microSD 32GB47.63724.481
Samsung EVO 32GB47.52629.450
SanDisk Ultra 40MB/s 32GB Card 347.39519.730
SanDisk Ultra 40MB/s 32GB Card 247.39320.015
Toshiba NFC 16GB37.88213.138
Toshiba FlashAir II 32GB19.10313.104

The SR2 reader is compatible with USB 3.0 and 2.0, although USB 2.0 connections are limited to 35MB/s transfer speed. Operating system compatibility is listed as Mac OS X 10.6+ and Windows 7/8. Lexar Professional Workflow products are covered by a two-year limited warranty. The SR2 reader is made in China.


The Lexar SR2 offers all the benefits of the SR1 plus UHS-II compatibility for up to triple the transfer speed provided by UHS-I. The design is well suited to a desktop or studio environment, and is a good alternative to the compact design of other UHS-II readers currently available. Considering the build quality, performance and reasonable price, the Lexar Professional SR2 is a very attractive SD card reader.

Compare prices on the Lexar Professional Workflow SR2 reader. The lowest prices are highlighted in the table below.

Card ReaderConnectionModel NumberPrices
AmazonB&H PhotoAdorama
Lexar Professional Workflow SR2 UHS-IIUSB 3.0LRWSR2RBNA$22.90Check priceCheck price