The Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black costs $0.0225/GB while the WD - Purple 4TB Surveillance Internal Hard Drive costs $0.0262/GB. Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black offers 14% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black vs WD - Purple 4TB Surveillance Internal Hard Drive — Which Is Better Value?
WD - Purple 4TB Surveillance Internal Hard Drive
Specification Comparison
| Spec | Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black | WD - Purple 4TB Surveillance Internal Hard Drive |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.0225 | $0.0262 |
| Price | $90.10 | $104.99 |
| Retailer | Amazon | Best Buy |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black offers better value at $0.0225//GB compared to the WD - Purple 4TB Surveillance Internal Hard Drive at $0.0262//GB — that's roughly 14% less per gigabyte.
The best deal for the Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black is $90.10 at Amazon, while the WD - Purple 4TB Surveillance Internal Hard Drive starts at $104.99 at Best Buy.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black and WD - Purple 4TB Surveillance Internal Hard Drive product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black or WD - Purple 4TB Surveillance Internal Hard Drive a better deal?
As of April 2026, Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black offers better value at $0.0225//GB compared to WD - Purple 4TB Surveillance Internal Hard Drive at $0.0262//GB. That is approximately 14% better value per gigabyte.
What is the price per GB of Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black?
The Seagate One Touch STKC4000400 4 TB Portable Hard Drive - 2.5" External - Black is currently priced at $0.0225/GB ($90.10 for 4 TB) at Amazon.
Where can I buy WD - Purple 4TB Surveillance Internal Hard Drive for the cheapest price?
The cheapest price for the WD - Purple 4TB Surveillance Internal Hard Drive is $104.99 at Best Buy, which works out to $0.0262/GB.