An external hard drive suitable for backups or for moving large files from one computer to another. Available in several sizes with different storage capacity, USB, Firewire and network access. Prices from 101 stores in this category.
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Product Lowest price User rating Rank Hard drive size Price/GB Form factor

LaCie 8big Rack Thunderbolt 2 48TB

External hard disk drive

$7,274.75

8
 126
 48,000  GB 0.15  $/GB3.5 inches 

LaCie 8big Rack Thunderbolt 2 Enterprise Class 48TB

External hard disk drive

$8,585.20

5
  201
 48,000  GB 0.18  $/GB 

Promise Pegasus2 R8 32TB

External hard disk drive

$6,929.00

7
 189
 32,000  GB 0.22  $/GB 

LaCie 5big Thunderbolt 2 30TB

External hard disk drive

$4,843.25

5
  180
 30,000  GB 0.16  $/GB3.5 inches 

Promise Pegasus2 R6 24TB

External hard disk drive

$6,198.50

  377
 24,000  GB 0.00  $/GB 

LaCie 8big Rack Thunderbolt 2 24TB

External hard disk drive

$4,125.90

9
 86
 24,000  GB 0.17  $/GB3.5 inches 

G-Technology G-Speed Studio 24TB

External hard disk drive

$4,999.95

1
  145
 24,000  GB 0.21  $/GB3.5 inches 

Promise Pegasus2 R8 24TB

External hard disk drive

$5,859.20

4
 216
 24,000  GB 0.24  $/GB 

LaCie 4Big Quadra USB 3.0/FW800 20TB

External hard disk drive

$2,375.21

4
  334
 20,000  GB 0.12  $/GB3.5 inches 

LaCie 5big Thunderbolt 2 20TB

External hard disk drive

$3,181.26

12
 90
 20,000  GB 0.16  $/GB3.5 inches 

LaCie 5big Thunderbolt 20TB

External hard disk drive

$3,260.51

1
  346
 20,000  GB 0.16  $/GB3.5 inches 

Promise Pegasus2 R6 18TB

External hard disk drive

$4,881.85

5
 193
 18,000  GB 0.27  $/GB 

LaCie 4Big Quadra USB 3.0/FW800 16TB

External hard disk drive

$2,180.08

6
  206
 16,000  GB 0.14  $/GB3.5 inches 

G-Technology G-Speed Q USB 3.0 16TB

External hard disk drive

$3,195.00

1
 144
 16,000  GB 0.20  $/GB3.5 inches 

LaCie 4Big Quadra USB 3.0/FW800 12TB

External hard disk drive

$1,463.50

  246
 12,000  GB 0.00  $/GB3.5 inches 

Promise Pegasus2 R4 12TB

External hard disk drive

$3,149.00

  379
 12,000  GB 0.00  $/GB 

WD My Book Duo 12TB

External hard disk drive

$1,049.00

12
 107
 12,000  GB 0.09  $/GB3.5 inches 

LaCie 2big Thunderbolt 2 12TB

External hard disk drive

$1,516.49

8
  128
 12,000  GB 0.13  $/GB3.5 inches 

WD My Book Pro Edition Thunderbolt 12TB

External hard disk drive

$1,753.00

10
 124
 12,000  GB 0.15  $/GB3.5 inches 

G-Technology G-RAID Studio 12TB

External hard disk drive

$2,199.95

1
  212
 12,000  GB 0.18  $/GB3.5 inches 

LaCie 8big Rack Thunderbolt 2 12TB

External hard disk drive

$2,601.86

11
 92
 12,000  GB 0.22  $/GB3.5 inches 

G-Technology G-Speed Studio 12TB

External hard disk drive

$3,499.95

2
  226
 12,000  GB 0.29  $/GB3.5 inches 

Promise Pegasus2 R6 12TB

External hard disk drive

$3,799.95

3
 140
 12,000  GB 0.32  $/GB 

Promise Pegasus R6 12TB

External hard disk drive

$3,827.86

1
 210
 12,000  GB 0.32  $/GB 

LaCie 2Big Quadra 10TB

External hard disk drive

$1,030.81

10
 162
 10,000  GB 0.10  $/GB3.5 inches 

WD My Book Pro Edition Thunderbolt 10TB

External hard disk drive

$1,535.00

5
 340
 10,000  GB 0.15  $/GB3.5 inches 

LaCie 5big Thunderbolt 10TB

External hard disk drive

$1,710.63

1
  345
 10,000  GB 0.17  $/GB3.5 inches 

LaCie 5big Thunderbolt 2 10TB

External hard disk drive

$2,188.22

6
  141
 10,000  GB 0.22  $/GB3.5 inches 

WD My Book Duo Thunderbolt V2 8TB

External hard disk drive

$1,062.30

  220
 8,000  GB 0.00  $/GB3.5 inches 

Seagate Backup Plus Desktop V2 USB 3.0 8TB

External hard disk drive

$494.62

23
 21
 8,000  GB 0.06  $/GB3.5 inches 

LaCie Hard Drive Porsche Desktop P9233 USB 3.0 8TB

External hard disk drive

* $598.08

11
 102
 8,000  GB 0.07  $/GB3.5 inches 

WD My Book Duo 8TB

External hard disk drive

$733.70

22
 66
 8,000  GB 0.09  $/GB3.5 inches 

LaCie 2Big Quadra V3 8TB

External hard disk drive

$871.83

10
 138
 8,000  GB 0.11  $/GB3.5 inches 

LaCie 2big Thunderbolt 2 8TB

External hard disk drive

$1,126.10

13
 82
 8,000  GB 0.14  $/GB3.5 inches 

LaCie 2Big Thunderbolt 8TB

External hard disk drive

$1,203.58

1
  356
 8,000  GB 0.15  $/GB3.5 inches 

WD My Book Pro Edition Thunderbolt 8TB

External hard disk drive

$1,317.00

10
 131
 8,000  GB 0.16  $/GB3.5 inches 

G-Technology G-RAID Studio 8TB

External hard disk drive

$1,399.95

1
  199
 8,000  GB 0.18  $/GB3.5 inches 

LaCie 4Big Quadra USB 3.0/FW800 8TB

External hard disk drive

$1,410.06

1
  361
 8,000  GB 0.18  $/GB 

Promise Pegasus2 R4 8TB

External hard disk drive

$2,635.66

4
 70
 8,000  GB 0.33  $/GB 

Seagate Backup Plus Desktop V2 USB 3.0 6TB

External hard disk drive

$429.97

21
 154
 6,000  GB 0.07  $/GB3.5 inches 

WD My Book USB 3.0 V2 6TB

External hard disk drive

$458.85

15
7/10
1 user review
78
 6,000  GB 0.08  $/GB3.5 inches 

WD My Book Duo 6TB

External hard disk drive

$518.15

16
 83
 6,000  GB 0.09  $/GB3.5 inches 

LaCie 2Big Quadra V3 6TB

External hard disk drive

$633.87

11
 197
 6,000  GB 0.11  $/GB3.5 inches 

LaCie d2 Professional Thunderbolt 2 6TB

External hard disk drive

$762.63

11
 99
 6,000  GB 0.13  $/GB3.5 inches 

LaCie 2Big Quadra 6TB

External hard disk drive

$913.47

2
  271
 6,000  GB 0.15  $/GB3.5 inches 

LaCie Little Big Disk Thunderbolt 7200rpm 6TB

External hard disk drive

$929.14

1
  360
 6,000  GB 0.15  $/GB3.5 inches 

Sonnet Fusion F3 6TB

External hard disk drive

$951.78

1
  294
 6,000  GB 0.16  $/GB 

LaCie 2big Thunderbolt 2 6TB

External hard disk drive

$989.69

6
  177
 6,000  GB 0.17  $/GB3.5 inches 

WD My Book Pro Edition Thunderbolt 6TB

External hard disk drive

$1,154.00

10
 72
 6,000  GB 0.19  $/GB3.5 inches 

G-Technology G-RAID Studio 6TB

External hard disk drive

$1,199.95

1
  215
 6,000  GB 0.20  $/GB3.5 inches 

Apricorn Aegis Padlock DT 256-bit AES 6TB

External hard disk drive

$1,233.74

1
  324
 6,000  GB 0.21  $/GB 

Apricorn Aegis Padlock DT FIPS 256-bit AES 6TB

External hard disk drive

$1,272.03

1
  317
 6,000  GB 0.21  $/GB 

Promise Pegasus2 Thunderbolt R2+ 6TB

External hard disk drive

$1,442.00

1
 97
 6,000  GB 0.24  $/GB 

Seagate Expansion Desktop Drive 5TB

External hard disk drive

$253.93

25
 12
 5,000  GB 0.05  $/GB3.5 inches 

WD Elements Desktop 3.0 5TB

External hard disk drive

$254.99

19
7/10
1 user review
43
 5,000  GB 0.05  $/GB3.5 inches 

Seagate Backup Plus Desktop V2 USB 3.0 5TB

External hard disk drive

$281.66

24
 28
 5,000  GB 0.06  $/GB3.5 inches 

LaCie Hard Drive Porsche P9230 USB 3.0 5TB

External hard disk drive

$293.04

9
4/10
1 user review
42
 5,000  GB 0.06  $/GB3.5 inches 

Seagate Expansion Desktop Drive V2 USB 3.0 5TB

External hard disk drive

$297.85

3
 5/10
1 user review
164
 5,000  GB 0.06  $/GB3.5 inches 

LaCie Hard Drive Porsche Desktop P9233 USB 3.0 5TB

External hard disk drive

$319.53

17
 80
 5,000  GB 0.06  $/GB3.5 inches 

LaCie d2 Proffessional 5TB

External hard disk drive

$407.34

12
 150
 5,000  GB 0.08  $/GB3.5 inches 

LaCie d2 Quadra USB 3.0 5TB

External hard disk drive

$692.13

1
  237
 5,000  GB 0.14  $/GB3.5 inches 

Seagate Backup Plus Desktop V2 for Mac USB 3.0 4TB

External hard disk drive

$327.70

  195
 4,000  GB 0.00  $/GB3.5 inches 

Seagate Expansion Desktop Drive 4TB

External hard disk drive

$212.91

28
 11
 4,000  GB 0.05  $/GB3.5 inches 

LaCie Hard Drive Porsche P9230 USB 3.0 4TB

External hard disk drive

$245.24

11
 38
 4,000  GB 0.06  $/GB3.5 inches 

Seagate Backup Plus Desktop V2 USB 3.0 4TB

External hard disk drive

* $245.95

19
4/10
1 user review
53
 4,000  GB 0.06  $/GB3.5 inches 

Seagate Expansion Desktop Drive V2 USB 3.0 4TB

External hard disk drive

* $255.00

4
 8/10
2 user reviews
46
 4,000  GB 0.06  $/GB3.5 inches 

WD My Book Essential USB 3.0 4TB

External hard disk drive

$263.35

2
 7/10
3 user reviews
252
 4,000  GB 0.07  $/GB3.5 inches 

Transcend StoreJet 35T3 TS4TSJ35T3 4TB

External hard disk drive

$265.97

2
  214
 4,000  GB 0.07  $/GB3.5 inches 

WD Elements Desktop 3.0 4TB

External hard disk drive

* $269.00

2
5/10
2 user reviews
203
 4,000  GB 0.07  $/GB3.5 inches 

Verbatim Store 'n' Save Desktop USB 3.0 4TB

External hard disk drive

$273.12

12
5/10
1 user review
153
 4,000  GB 0.07  $/GB3.5 inches 

LaCie Hard Drive Porsche Desktop P9233 USB 3.0 4TB

External hard disk drive

$277.45

17
 77
 4,000  GB 0.07  $/GB3.5 inches 

WD My Book USB 3.0 V2 4TB

External hard disk drive

$284.98

17
3/10
1 user review
29
 4,000  GB 0.07  $/GB3.5 inches 

Seagate Backup Plus Portable V2 USB 3.0 4TB

External hard disk drive

$298.68

15
 13
 4,000  GB 0.07  $/GB2.5 inches 

Seagate Backup Plus Desktop for Mac USB 3.0 4TB

External hard disk drive

$299.00

1
  244
 4,000  GB 0.07  $/GB3.5 inches 

Seagate Expansion Portable Drive 4TB

External hard disk drive

$302.62

6
  114
 4,000  GB 0.08  $/GB2.5 inches 

LaCie d2 Proffessional 4TB

External hard disk drive

$326.29

10
 115
 4,000  GB 0.08  $/GB3.5 inches 

Seagate Backup Plus Fast Portable USB 3.0 4TB

External hard disk drive

$352.94

24
7/10
2 user reviews
27
 4,000  GB 0.09  $/GB2.5 inches 

WD My Book Studio USB 3.0 V2 4TB

External hard disk drive

* $358.06

6
 163
 4,000  GB 0.09  $/GB3.5 inches 

WD My Book Studio USB 3.0 4TB

External hard disk drive

$383.00

1
7/10
2 user reviews
364
 4,000  GB 0.10  $/GB3.5 inches 

WD My Book Duo 4TB

External hard disk drive

$449.99

20
 59
 4,000  GB 0.11  $/GB3.5 inches 

HGST Touro Desk DX3 4TB

External hard disk drive

$570.75

1
  362
 4,000  GB 0.14  $/GB3.5 inches 

LaCie d2 Professional Thunderbolt 2 4TB

External hard disk drive

$595.14

7
  109
 4,000  GB 0.15  $/GB3.5 inches 

Apricorn Aegis Padlock DT 256-bit AES 4TB

External hard disk drive

$600.85

1
  306
 4,000  GB 0.15  $/GB3.5 inches 

LaCie d2 4TB

External hard disk drive

$614.20

1
  358
 4,000  GB 0.15  $/GB3.5 inches 

LaCie Rugged RAID Thunderbolt/USB 3.0 4TB

External hard disk drive

$635.94

12
 65
 4,000  GB 0.16  $/GB2.5 inches 

LaCie 2Big Quadra V3 4TB

External hard disk drive

$665.17

3
  202
 4,000  GB 0.17  $/GB3.5 inches 

WD My Book Duo Thunderbolt V2 4TB

External hard disk drive

* $736.56

2
  219
 4,000  GB 0.18  $/GB3.5 inches 

WD My Passport Pro Thunderbolt 4TB

External hard disk drive

$746.35

18
7/10
1 user review
89
 4,000  GB 0.19  $/GB2.5 inches 

LaCie Little Big Disk Thunderbolt 7200rpm 4TB

External hard disk drive

$757.95

1
  359
 4,000  GB 0.19  $/GB3.5 inches 

Apricorn Aegis Padlock DT FIPS 256-bit AES 4TB

External hard disk drive

$831.64

1
  316
 4,000  GB 0.21  $/GB 

LaCie 2Big Quadra 4TB

External hard disk drive

$861.19

2
  273
 4,000  GB 0.22  $/GB3.5 inches 

Promise Pegasus2 M4 4TB

External hard disk drive

$2,199.00

1
  132
 4,000  GB 0.55  $/GB2.5 inches 

Seagate Expansion Desktop Drive 3TB

External hard disk drive

$163.35

31
 16
 3,000  GB 0.05  $/GB3.5 inches 

WD Elements Desktop 2.0 3TB

External hard disk drive

$166.75

2
 7/10
3 user reviews
257
 3,000  GB 0.06  $/GB3.5 inches 

Seagate Expansion Desktop Drive V2 USB 3.0 3TB

External hard disk drive

$177.10

9
8/10
10 user reviews
35
 3,000  GB 0.06  $/GB3.5 inches 

Verbatim Store 'n' Save Desktop USB 3.0 3TB

External hard disk drive

$193.59

13
7/10
5 user reviews
185
 3,000  GB 0.06  $/GB3.5 inches 

Transcend StoreJet 35T3 TS3TSJ35T3 3TB

External hard disk drive

$197.02

1
  228
 3,000  GB 0.07  $/GB3.5 inches 

Seagate Backup Plus Desktop V2 USB 3.0 3TB

External hard disk drive

* $198.81

18
 165
 3,000  GB 0.07  $/GB3.5 inches 

LaCie Hard Drive Porsche Desktop P9233 USB 3.0 3TB

External hard disk drive

$211.99

13
 56
 3,000  GB 0.07  $/GB3.5 inches 

WD Elements Desktop 3.0 3TB

External hard disk drive

* $220.79

3
  225
 3,000  GB 0.07  $/GB3.5 inches 
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