WD Red Plus NAS 4 TB: price per TB and price history
Part number WD40EFRXASIN B00EHBERSEBrand Western DigitalInternal 3.5"
The WD Red Plus NAS 4 TB (WD40EFRX) is an internal 3.5-inch hard drive by Western Digital. On amazon.com it costs $219.99 new, which is $55.00 per TB (as of Oct 28, 2026, 12:40 AM UTC). That is the lowest price per TB of the last 90 days.
Price per TB, New
Total $219.99 for 4 TB, cheapest new offer, excl. shipping
- 1 day
- ▼ 0.7 %
- 7 days
- ▼ 12.8 %
- 30 days
- ▼ 21.4 %
- 90-day low
- 55.00
90 days
Price per TB, Used
Total $148.99 for 4 TB, cheapest used offer, excl. shipping
- 1 day
- 0.0 %
- 7 days
- ▲ 6.4 %
- 30 days
- ▲ 6.4 %
- 90-day low
- 34.64
90 days
How much does the WD Red Plus NAS 4 TB cost per TB?
The WD Red Plus NAS 4 TB costs $55.00 per TB new on amazon.com. That is 51.7% above the TB index for internal 3.5-inch hard drives ($36.25 per TB). Among 79 new internal 3.5-inch hard drives it ranks number 40 by price per TB.
| Condition | Price | Price per TB | As of | Offer |
|---|---|---|---|---|
| Used | $148.99Oct 28, 2026, 12:40 AM UTC | $37.25 | Oct 28, 2026, 12:40 AM UTC | Amazon* |
| New | $219.99Oct 28, 2026, 12:40 AM UTC | $55.00 | Oct 28, 2026, 12:40 AM UTC | Amazon* |
Prices: cheapest offer per condition from all sellers on amazon.com (Amazon and marketplace sellers), excluding shipping, timestamp per row. At the top of its product page, Amazon often shows the featured offer from another seller, which can cost more. The button therefore opens the list of all offers. The price may have changed since the timestamp. If the Amazon app opens in another country's store, prices there differ: set the app to United States or open the link in your browser.
How has the price of the WD Red Plus NAS 4 TB changed?
Over the last 30 days the price fell by 21.4%, from $280.00 to $219.99. The 90-day low is $55.00 per TB ($219.99). It counts the lowest price that held for at least 2 days.
| Period | Change in price per TB |
|---|---|
| 7 days | ▼ 12.8 % |
| 14 days | ▼ 14.5 % |
| 30 days | ▼ 21.4 % |
| 90 days | ▼ 22.5 % |
Price archive since Jul 30, 2026, updated daily.
What are the specs of the WD Red Plus NAS 4 TB?
According to the Western Digital data sheet, the WD Red Plus NAS 4 TB has 5,400 rpm and 64 MB cache.
| Spec | Value |
|---|---|
| Brand | Western Digital |
| Series | WD Red |
| Part number | WD40EFRX |
| ASIN | B00EHBERSE |
| Capacity | 4 TB (4 × 10¹² Byte) |
| Form factor | 3.5" internal |
| Technology | HDD |
| Spindle speed | class 5,400 rpm |
| Cache | 64 MB |
Source: Western Digital data sheet
What are the alternatives to the WD Red Plus NAS 4 TB?
No other capacity in the same series is cheaper per TB. At 4 TB, the White Label WL 4 TB (WL4000GSA6472E) costs $42.49 per TB.
| Product | Capacity | Price per TB | Recording |
|---|---|---|---|
| WD Red NAS 6 TB | 6 TB | $68.32 | SMR |
| Product | Capacity | Price per TB | Recording |
|---|---|---|---|
| White Label WL 4 TB | 4 TB | $42.49 | |
| Mdd Maxdigitaldata 7200PM CCTV DVR 4 TB | 4 TB | $42.50 | |
| WD Blue PC 4 TB | 4 TB | $45.00 | CMR |
| Seagate IronWolf 4 TB | 4 TB | $47.50 | |
| WD Red Plus NAS 4 TB | 4 TB | $47.50 | CMR |
Frequently asked questions about the WD Red Plus NAS 4 TB
Is the WD Red Plus NAS 4 TB cheap right now?
The price per TB is at its 90-day low of $55.00 per TB and 51.7% above the TB index for its product type (as of Oct 28, 2026, 12:40 AM UTC).
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Prices: amazon.com, timestamp per row. Specs: manufacturer data sheet. Calculation: How the TB index works. All offers Internal 3.5".