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SanDisk Extreme Pro SD UHS-II Reader/Writer SDDR-399

SanDisk Extreme Pro SD UHS-II Reader/Writer USB 3.0 SDDR-399

Introduction

The SanDisk Extreme Pro SD UHS-II SD Reader/Writer is a single-slot compact USB 3.0 SD card reader. It supports full-size SD and can operate in UHS-I and UHS-II modes.

The SanDisk reader is compatible with Max OS 10.3x+, Windows 7/8/10. It supports USB 3.0 and is backwards compatible with USB 2.0 connections. It is backed by a two year warranty. The reader tested is model SDDR-399-G46 UPC 619659146641. The reader is made in China.

Externally, the reader has a plastic case with brushed metal accent panel on top. There is a card access light on the top of the reader above the brushed metal panel. The ends and side of the reader and the slider are high gloss plastic while the top and bottom have a textured appearance. The reader has a lightweight and hollow feeling but is sufficiently rigid.

SanDisk Extreme Pro SD UHS-II Reader/Writer USB 3.0 SDDR-399 bottom

The body of the reader is tapered on the end next to the USB Type-A connector. Unlike the previous model SDDR-329 Extreme Pro UHS-II USB 3.0 reader, the SDDR-399 has no quirky slider. There is a single card slot on the end of the reader. Initially the card slot on the reader was extremely tight to the extent that removing some SD cards was difficult. Some cards were comfortably snug while others were hard to remove even when using fingernails. Over time the slot loosened after inserting several dozen cards, but still remains a tight fit.

The reader measures 2.5 x 1.25 x 0.31 inches (64 x 32 x 8mm) including the USB plug. The reader is small but it may cause interference with USB ports located close together.

Performance

The SDDR-399 UHS-II reader was benchmarked with UHS-I and UHS-II SD cards. The highest benchmarks were 302.1 MB/s sequential read and 266.4 MB/s sequential write.

Using UHS-I cards the reader reached sequential benchmarks of 99.3 MB/s read and 94.7 MB/s write.

Reader: SanDisk Extreme Pro SD UHS-II Reader/Writer
Benchmark: CrystalDiskMark 3.0.3 x64
Program settings: 1000 MB, 5 passes, random test data
Operating system: Windows 8.1 Pro
Motherboard: Gigabyte GA-Z77X-UD3H
Processor: Intel Core i7-3770K @ 4.40GHz
RAM: 32GB DDR3 1600

SanDisk Extreme Pro SD UHS-II Reader/Writer
Card Benchmarks
Sequential
Read
(MB/s)
Sequential
Write
(MB/s)
SanDisk Extreme Pro 300MB/s UHS-II 32GB302.314246.318
SanDisk Extreme Pro 300MB/s UHS-II 64GB302.140247.685
SanDisk Extreme Pro 300MB/s UHS-II 128GB301.835247.306
SanDisk Extreme Pro UHS-II 275MB/s microSDXC 64GB290.143106.910
Transcend Ultimate UHS-II U3 64GB285.871182.838
Lexar Professional 2000x UHS-II 32GB283.055266.339
ProGrade 250MB/s UHS-II V90 64GB282.673248.950
Lexar Professional 2000x UHS-II Rev E 32GB282.445261.849
Lexar Professional 2000x UHS-II 64GB282.027264.792
Transcend Ultimate UHS-II U3 32GB281.648181.745
Adata Premier One UHS-II V90 64GB281.459248.037
Transcend 700S UHS-II V90 64GB281.384196.087
Lexar Professional 2000x UHS-II Rev E 64GB281.233262.669
Sony SF-G 300MB/s UHS-II 32GB279.881254.632
SanDisk Extreme Pro 280MB/s UHS-II 32GB279.285230.938
Lexar Professional 1800x microSD UHS-II 32GB278.617231.295
Sony SF-G 300MB/s UHS-II 64GB278.211255.657
Angelbird AV Pro V90 64GB277.989247.247
Sony M Series UHS-II 128GB277.58593.824
Integral UltimaProX2 UHS-II V90 64GB277.364244.909
Lexar Professional 1800x microSD UHS-II 64GB277.291232.655
Delkin Power 2000x UHS-II V90 64GB277.254223.386
Delkin 1900x UHS-II 32GB277.18151.021
Sony SF-G 300MB/s UHS-II 128GB276.487253.985
Delkin Power UHS-II V90 128GB276.050218.181
Sony Tough UHS-II 64GB275.651250.586
Lexar Professional 2000x UHS-II Rev B 128GB275.289228.922
Sony M Series UHS-II 32GB275.217114.149
Panasonic MicroP2 UHS-II 32GB275.00049.707
Hoodman Steel UHS-II 64GB272.357183.574
Verbatim Pro II Plus UHS-II V90 64GB272.145233.822
Lexar Professional 1800x microSD UHS-II 128GB271.828107.801
Delkin Prime UHS-II V60 64GB270.04394.220
Sony M Series UHS-II 64GB268.93594.731
Toshiba Exceria Pro UHS-II 32GB261.002233.276
Toshiba Exceria Pro N502 64GB259.967235.186
ProGrade 200MB/s UHS-II V60 64GB166.309107.934
Lexar Professional 1000x UHS-II Rev C 64GB166.30989.745
Angelbird AV Pro V60 64GB165.417109.375
Lexar Professional 1000x UHS-II 256GB156.43492.402
Lexar Professional 1000x UHS-II Rev C 128GB155.04690.747
Lexar Professional 1000x UHS-II 32GB154.24886.041
Lexar Professional 1000x UHS-II Rev B 32GB153.52585.091
Lexar Professional 1000x UHS-II 64GB152.85483.234
Lexar Professional 1000x UHS-II microSD 128GB152.34359.091
Lexar Professional 1000x UHS-II 128GB151.70486.673
Lexar Professional 1000x UHS-II microSD 64GB143.26853.710
SanDisk Extreme Pro 95MB/s 64GB99.30692.410
SanDisk Extreme 90MB/s U3 64GB99.30649.688
SanDisk Extreme Pro 95MB/s U3 V30 256GB99.30690.637
SanDisk Extreme Pro 95MB/s 32GB99.30690.527
SanDisk Extreme Pro 95MB/s U3 V30 128GB99.30691.379
SanDisk Extreme 90MB/s U3 V30 64GB99.30654.204
SanDisk Extreme Pro 95MB/s U3 V30 64GB99.29790.504
SanDisk Extreme Plus 100MB/s A1 microSDXC 64GB99.29790.154
SanDisk Extreme 90MB/s U3 V30 32GB99.29753.431
SanDisk Extreme 90MB/s U3 V30 128GB99.29765.717
SanDisk Extreme Pro 95MB/s 256GB99.29791.747
SanDisk Extreme Pro 95MB/s microSDHC 32GB99.29792.264
SanDisk Extreme Pro 95MB/s microSDXC 64GB99.29792.207
SanDisk Extreme Pro 95MB/s 128GB99.29792.085
SanDisk Extreme 100MB/s A1 microSDXC 128GB99.28863.766
SanDisk Extreme Plus 95/90 MB/s microSD 32GB99.28892.337
SanDisk Extreme 90MB/s U3 32GB99.28849.254
SanDisk Extreme Plus 100MB/s A1 microSDHC 32GB99.28891.403
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 128GB99.28890.433
SanDisk Ultra Plus V10 A1 microSDXC 128GB99.28862.289
SanDisk Extreme Plus 100MB/s A1 microSDXC 128GB99.28890.363
SanDisk Extreme 100MB/s A1 microSDXC 64GB99.27872.365
SanDisk Extreme Pro 95MB/s U3 32GB99.27891.972
SanDisk Extreme Pro 95MB/s U3 V30 32GB99.27890.999
SanDisk Extreme 90MB/s U3 V30 microSDHC 32GB99.27870.488
SanDisk Extreme Plus 90MB/s U3 V30 32GB99.27866.797
Kingston Canvas React V30 256GB99.27880.691
SanDisk Extreme Plus 95/90 MB/s microSD 64GB99.27892.126
SanDisk Ultra 80MB/s 128GB99.27839.357
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDHC 32GB99.26990.857
Kingston Canvas Go! V30 256GB99.26980.647
AgfaPhoto Professional 64GB99.26991.070
SanDisk Extreme 90MB/s U3 V30 microSDXC 128GB99.26963.922
SanDisk Extreme Plus 90MB/s U3 V30 64GB99.25965.426
SanDisk Extreme 100MB/s A1 microSDHC 32GB99.25971.958
SanDisk Extreme 90MB/s U3 V30 256GB99.25064.931
SanDisk Ultra 80MB/s 32GB Card 299.25020.706
Kingston Canvas React V30 128GB99.25081.361
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 64GB99.25091.827
Kingston Canvas React V30 64GB99.24181.818
SanDisk Extreme 90MB/s U3 V30 microSDXC 64GB99.23170.845
SanDisk Ultra 80MB/s microSD 64GB99.20320.600
SanDisk Extreme 90MB/s microSDHC 32GB99.15648.935
SanDisk Ultra 80MB/s microSD 128GB99.14754.653
SanDisk Extreme Plus V30 A2 microSDXC 128GB98.96086.702
Toshiba Exceria UHS-I Class 3 32GB98.68060.611
Toshiba Exceria UHS-I Class 3 64GB98.67159.615
Samsung EVO Select microSDXC 256GB98.24687.156
Polaroid Extreme Performance 95/90 MB/s 64GB98.06279.819
Kingston U3 90/80 MB/s 32GB98.05389.416
Kingston U3 90/80 MB/s 64GB98.05386.076
Patriot EP Series microSDXC 64GB98.05377.546
Kingston Class 10 UHS-I 64GB98.04471.791
Kingston U3 (90/80) microSD 64GB98.03475.671
Kingston U3 90/80 MB/s 256GB98.03487.549
PNY Pro Elite microSDXC 64GB98.01677.409
Panasonic Gold 95/90 64GB98.01677.175
Kingston Canvas Go! V30 64GB97.97082.630
PNY Elite microSDXC 64GB97.97032.460
Lexar Professional 633x microSDXC 64GB97.97028.377
Lexar Professional 633x U1 32GB97.93421.744
Kingston U3 90/80 MB/s 128GB97.93478.959
Verbatim Pro Plus V30 64GB97.92578.811
Lexar Professional 633x U1 64GB97.90628.940
Transcend 600x 64GB97.89766.972
Silicon Power Superior Pro 128GB97.89760.713
Sony Ultra-High Durability Professional 64GB97.89776.055
Transcend 633x microSDHC 32GB97.88886.118
PNY Elite Performance U3 128GB97.88867.948
Patriot EP PRO microSDXC 64GB97.88876.903
PNY Elite Performance U1 32GB97.87938.215
Gobe Magic 104MB/s 64GB97.87988.361
Transcend 95/60 MB/s U3 64GB97.87067.572
Transcend 95/60 MB/s U3 128GB97.87064.783
PNY Elite Performance U1 64GB97.86166.725
Transcend 500S V30 64GB97.85168.396
Transcend 600x 32GB97.84239.117
Gobe Magic 104MB/s 32GB97.84288.757
PNY Elite microSDXC 128GB97.84230.025
PNY Pro Elite 64GB97.84275.628
Lexar Professional 633x U3 256GB97.84268.985
Transcend 95/60 MB/s U3 256GB97.83368.737
PNY Elite Performance U3 256GB97.82454.639
Transcend 600x 128GB97.81568.262
Transcend Ultimate 633x microSD 64GB97.81587.828
Transcend 500S 64GB Card 297.81564.891
PNY Elite-X microSDXC 64GB97.80672.201
Lexar Professional 633x U1 128GB97.80630.847
Sony 95MB/s U3 64GB97.79787.432
PNY Elite-X microSDHC 32GB97.74276.533
Transcend 500S V30 128GB97.73363.852
Samsung PRO Plus 64GB97.73388.257
Samsung PRO U3 32GB97.73379.849
Transcend 95/85 MB/s U3 32GB97.72488.630
Transcend R95 W85 U3 64GB97.71588.242
Patriot EP Pro 128GB97.70642.439
Samsung PRO Plus 32GB97.66987.571
Samsung PRO Select microSDXC 64GB97.66087.740
Samsung PRO U3 64GB97.66078.722
Toshiba Exceria Pro N401 95/75 MB/s 128GB97.62476.533
Samsung PRO microSDXC 64GB97.61578.610
Samsung PRO Plus microSDXC 64GB97.61588.175
Sony 95MB/s U3 32GB97.60687.040
Patriot EP Pro 90MB/s 64GB97.46941.403
Samsung EVO Select microSDXC 64GB97.36125.754
Toshiba Exceria Pro N401 95/75 MB/s 128GB97.25276.444
Delkin Elite 633x 32GB97.16280.965
Delkin Black 32GB97.13580.660
PNY Elite Performance U3 64GB97.03664.172
Patriot EP Pro 90MB/s 32GB96.96546.992
SanDisk Extreme Plus 90MB/s 32GB96.60772.526
Kingston U3 (90/80) microSD 32GB96.44785.689
Kingston Ultimate 32GB96.00646.126
Lexar Professional 1000x microSD UHS-II 32GB95.92752.137
Panasonic Gold Series 32GB95.27342.837
Kingston Canvas Select 64GB94.90223.977
Samsung PRO Select microSDXC 128GB94.78284.460
Samsung PRO Plus microSDXC 128GB94.77484.345
SanDisk Extreme Plus 90MB/s 64GB94.42472.186
Toshiba FlashAir W-04 64GB93.95075.628
SanDisk Ultra 80MB/s 32GB93.66542.860
SanDisk Extreme 90MB/s microSDXC 64GB90.81741.506
Lexar Professional 633x microSDXC 200GB90.38736.347
SanDisk Ultra 90MB/s microSD 200GB90.24719.216
Kingston Class 10 256GB90.13047.684
SanDisk Extreme 90MB/s U3 128GB85.39678.252
SanDisk Ultra 80MB/s 64GB82.53316.022
Lexar Professional 633x microSDXC 128GB82.24122.214
SanDisk Ultra 80MB/s microSD 32GB82.01615.318
Samsung EVO Plus 128GB microSDXC81.38021.763
Samsung EVO Select microSDXC 128GB81.21622.110
Samsung EVO microSDXC 64GB46.64323.383
Samsung EVO microSD 32GB46.47123.988
AData Premier One UHS-II V90 256GB0.0000.000

Compare prices on the SanDisk Extreme Pro SD UHS-II Reader/Writer reader. The lowest prices are highlighted in the table below.

Card ReaderConnectionModel NumberPrices
AmazonB&H PhotoAdorama
SanDisk Extreme Pro SD UHS-II Reader/WriterUSB 3.0SDDR-399$24.99