Loading drive details

Seagate Expansion 18TB HDD Price & Specs | ListofDisks

Seagate Expansion 18TB

Name: Seagate Expansion 18TB
Brand: Seagate
SKU: STKP18000400
Availability: InStock

Pricing, offers, specs, and price-history.

$33.33/TB$599.95 total

See at Amazon

Lowest current offer90d low: $20.42/TBChecked 4h 55m ago

Model STKP18000400

Capacity: 18TB
Technology: HDD
Form factor: External
Interface: USB

If this isn't the right fit

Here are a few nearby options pulled from the live catalog.

Spend less in the same line

Seagate Expansion 4TB

$52.50/TB • $209.99 total

4TB • HDD • USB

Stay with Expansion and cut the starting price.

View drive

Lower $/TB at this capacity

Western Digital Elements 18TB

$22.22/TB • $399.99 total

18TB • HDD • USB

Another 18TB option is currently cheaper per terabyte.

View drive

Similar from this brand

Seagate STKP20000400 20TB

$22.00/TB • $439.99 total

20TB • HDD • USB • 3-year warranty

Same interface and a more comparable size from Seagate.

View drive

Need a wider comparison?Ask Drive Finder →

Live offers

Current offers across retailers. Showing all active offers, including 1 non-new.

Checked 4h 55m agoNew (0)All active (1)

Retailer	Price	$/TB	Condition	Stock	Checked
Amazon via -1 3rd Party

Lowest $/TB$33.33/TB

See Deal

Price chart ($/TB)

Daily median $/TB with historical lows highlighted.

Median $/TB Daily low $/TB

30d 90d 180d 365d

Median $/TB Daily low $/TB

Date	Median $/TB	Low $/TB
Apr 4, 2026	$27.63	$21.94
Apr 3, 2026	$21.94	$21.94
Apr 2, 2026	$33.33	$21.94
Apr 1, 2026	$27.63	$21.94
Mar 31, 2026	$27.63	$21.94
Mar 30, 2026	$33.33	$21.94
Mar 29, 2026	$33.33	$33.33
Mar 28, 2026	$33.33	$21.94
Mar 27, 2026	$33.33

Apr 4, 2026

Median $/TB$27.63

Low $/TB$21.94

Apr 3, 2026

Median $/TB$21.94

Low $/TB$21.94

Apr 2, 2026

Median $/TB$33.33

Low $/TB$21.94

Apr 1, 2026

Median $/TB$27.63

Low $/TB$21.94

Mar 31, 2026

Median $/TB$27.63

Low $/TB$21.94

Mar 30, 2026

Median $/TB$33.33

Low $/TB$21.94

HistoryDaily

Median, range, and averages for each day period.

Period start	Obs	Median $/TB	Range $/TB	Avg $/TB	Median price
Jan 22, 2026	1	$21.57	$21.57 – $21.57	$21.57	$388.24
Jan 23, 2026	1	$21.94	$21.94 – $21.94	$21.94	$394.94
Jan 24, 2026	2	$21.07	$20.98 – $21.16

Jan 22, 20261 obs

Median $/TB$21.57

Range $/TB$21.57 – $21.57

Avg $/TB$21.57

Median price$388.24

Jan 23, 20261 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.94

Jan 24, 20262 obs

Median $/TB$21.07

Range $/TB$20.98 – $21.16

Avg $/TB$21.07

Median price$379.21

Jan 25, 20264 obs

Median $/TB$20.98

Range $/TB$20.98 – $21.18

Avg $/TB$21.03

Median price$377.57

Jan 26, 20261 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Jan 27, 202626 obs

Median $/TB$21.24

Range $/TB$21.24 – $21.24

Avg $/TB$21.24

Median price$382.39

Jan 28, 20262 obs

Median $/TB$21.26

Range $/TB$20.98 – $21.55

Avg $/TB$21.26

Median price$382.76

Jan 29, 20261 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Jan 30, 20261 obs

Median $/TB$21.55

Range $/TB$21.55 – $21.55

Avg $/TB$21.55

Median price$387.95

Jan 31, 20262 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Feb 1, 20263 obs

Median $/TB$20.98

Range $/TB$20.98 – $21.66

Avg $/TB$21.21

Median price$377.57

Feb 2, 20261 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Feb 3, 20262 obs

Median $/TB$21.32

Range $/TB$20.98 – $21.66

Avg $/TB$21.32

Median price$383.76

Feb 4, 20262 obs

Median $/TB$21.15

Range $/TB$20.98 – $21.32

Avg $/TB$21.15

Median price$380.66

Feb 5, 20261 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Feb 6, 20261 obs

Median $/TB$20.98

Range $/TB$20.98 – $20.98

Avg $/TB$20.98

Median price$377.57

Feb 7, 20262 obs

Median $/TB$21.04

Range $/TB$21.04 – $21.04

Avg $/TB$21.04

Median price$378.78

Feb 8, 20264 obs

Median $/TB$21.01

Range $/TB$20.55 – $21.04

Avg $/TB$20.90

Median price$378.18

Feb 9, 20262 obs

Median $/TB$20.59

Range $/TB$20.55 – $20.62

Avg $/TB$20.58

Median price$370.53

Feb 10, 20263 obs

Median $/TB$20.62

Range $/TB$20.62 – $20.98

Avg $/TB$20.74

Median price$371.10

Feb 11, 20262 obs

Median $/TB$20.59

Range $/TB$20.55 – $20.62

Avg $/TB$20.58

Median price$370.53

Feb 12, 20262 obs

Median $/TB$20.76

Range $/TB$20.55 – $20.98

Avg $/TB$20.76

Median price$373.77

Feb 13, 20262 obs

Median $/TB$20.59

Range $/TB$20.53 – $20.64

Avg $/TB$20.58

Median price$370.53

Feb 14, 20263 obs

Median $/TB$20.62

Range $/TB$20.62 – $20.98

Avg $/TB$20.74

Median price$371.10

Feb 15, 20263 obs

Median $/TB$20.62

Range $/TB$20.62 – $21.50

Avg $/TB$20.91

Median price$371.10

Feb 16, 20265 obs

Median $/TB$20.98

Range $/TB$20.98 – $21.50

Avg $/TB$21.19

Median price$377.57

Feb 17, 202610 obs

Median $/TB$20.98

Range $/TB$20.98 – $24.64

Avg $/TB$21.71

Median price$377.57

Feb 18, 20269 obs

Median $/TB$20.98

Range $/TB$20.98 – $25.83

Avg $/TB$22.01

Median price$377.57

Feb 19, 202611 obs

Median $/TB$20.98

Range $/TB$20.98 – $25.45

Avg $/TB$22.19

Median price$377.57

Feb 20, 20269 obs

Median $/TB$20.98

Range $/TB$20.42 – $25.40

Avg $/TB$21.90

Median price$377.57

Feb 21, 20268 obs

Median $/TB$20.98

Range $/TB$20.42 – $20.98

Avg $/TB$20.91

Median price$377.57

Feb 22, 20265 obs

Median $/TB$20.98

Range $/TB$20.98 – $26.78

Avg $/TB$23.30

Median price$377.57

Feb 23, 20262 obs

Median $/TB$23.87

Range $/TB$20.98 – $26.77

Avg $/TB$23.87

Median price$429.71

Feb 24, 20263 obs

Median $/TB$26.77

Range $/TB$20.98 – $26.77

Avg $/TB$24.84

Median price$481.85

Feb 25, 20262 obs

Median $/TB$23.58

Range $/TB$20.98 – $26.19

Avg $/TB$23.58

Median price$424.49

Feb 26, 20263 obs

Median $/TB$22.66

Range $/TB$20.98 – $25.66

Avg $/TB$23.10

Median price$407.88

Feb 27, 20262 obs

Median $/TB$23.32

Range $/TB$20.98 – $25.66

Avg $/TB$23.32

Median price$419.72

Feb 28, 20263 obs

Median $/TB$26.45

Range $/TB$21.94 – $28.99

Avg $/TB$25.79

Median price$476.05

Mar 1, 20262 obs

Median $/TB$25.46

Range $/TB$21.94 – $28.99

Avg $/TB$25.46

Median price$458.29

Mar 2, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $28.99

Avg $/TB$23.53

Median price$394.83

Mar 3, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $24.61

Avg $/TB$22.47

Median price$394.83

Mar 4, 20266 obs

Median $/TB$21.94

Range $/TB$21.94 – $29.02

Avg $/TB$23.56

Median price$394.83

Mar 5, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $29.52

Avg $/TB$23.45

Median price$394.83

Mar 6, 20266 obs

Median $/TB$21.94

Range $/TB$21.94 – $29.52

Avg $/TB$24.26

Median price$394.83

Mar 7, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $28.28

Avg $/TB$23.20

Median price$394.83

Mar 8, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $29.52

Avg $/TB$24.72

Median price$394.83

Mar 9, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $29.52

Avg $/TB$23.45

Median price$394.83

Mar 10, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $28.28

Avg $/TB$23.20

Median price$394.83

Mar 11, 20266 obs

Median $/TB$21.94

Range $/TB$21.94 – $28.28

Avg $/TB$24.05

Median price$394.83

Mar 12, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 13, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 14, 20263 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 15, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 16, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 17, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$24.21

Median price$394.83

Mar 18, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$24.21

Median price$394.83

Mar 19, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 20, 20263 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 21, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 22, 20264 obs

Median $/TB$21.94

Range $/TB$21.94 – $21.94

Avg $/TB$21.94

Median price$394.83

Mar 23, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$24.21

Median price$394.83

Mar 24, 20265 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$24.21

Median price$394.83

Mar 25, 20267 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$26.82

Median price$394.83

Mar 26, 20265 obs

Median $/TB$33.33

Range $/TB$21.94 – $33.33

Avg $/TB$31.05

Median price$599.95

Mar 27, 20264 obs

Median $/TB$33.33

Range $/TB$21.94 – $33.33

Avg $/TB$30.48

Median price$599.95

Mar 28, 20265 obs

Median $/TB$33.33

Range $/TB$21.94 – $33.33

Avg $/TB$31.05

Median price$599.95

Mar 29, 20263 obs

Median $/TB$33.33

Range $/TB$33.33 – $33.33

Avg $/TB$33.33

Median price$599.95

Mar 30, 20264 obs

Median $/TB$33.33

Range $/TB$21.94 – $33.33

Avg $/TB$30.48

Median price$599.95

Mar 31, 20268 obs

Median $/TB$27.63

Range $/TB$21.94 – $33.33

Avg $/TB$27.63

Median price$497.39

Apr 1, 20268 obs

Median $/TB$27.63

Range $/TB$21.94 – $33.33

Avg $/TB$27.63

Median price$497.39

Apr 2, 20267 obs

Median $/TB$33.33

Range $/TB$21.94 – $33.33

Avg $/TB$28.45

Median price$599.95

Apr 3, 20267 obs

Median $/TB$21.94

Range $/TB$21.94 – $33.33

Avg $/TB$26.82

Median price$394.83

Apr 4, 20262 obs

Median $/TB$27.63

Range $/TB$21.94 – $33.33

Avg $/TB$27.63

Median price$497.39