What two 2TB drives provide in RAID1
Two equal 2 TB drives in RAID1 provide roughly 2 TB before formatting and reserved space. Redundancy protects availability in some failures; keep an independent backup.[1]
Western Digital · NAS hard drive buying guide
WD Red Plus 2TB (WD20EFPX) Buying Guide
Product facts and dated cost
Western Digital WD Red Plus 2TB · Exact identity: WD20EFPX
2TB decimal capacity · CMR · SATA 6 Gb/s
Catalog amount: $154.99 · historical · Price record: 2026-10-09T01:23:41.974420+00:00. Tax and shipping excluded.
Historical price observation. Recheck the price and availability before buying; this is not a current offer.
WD Red Plus 2TB: specifications and dated store comparison →A 2TB CMR drive for a small home NAS; plan usable capacity and backup before choosing a pair.
One 2 TB WD20EFPX drive ·3.5-inch SATA ·CMR ·5400 RPM
WD20EFPX is the 2TB air-filled Red Plus SKU: CMR, 5400 RPM, 64 MB cache, 180 MB/s, 21/26 dBA, 4.0/2.4 W, 450 g, 180 TB/year, 3-year warranty. It is the smallest current US catalog capacity in this family and is easy to confuse with older WD20EFZX. No exact-MPN professional original test was confirmed. This site has not tested the drive. See evidence and test gaps ↓
Is this 2TB drive right for your NAS?
Shared files and backup targets
CMR and the 180 TB/year class suit NAS data storage within the stated limits.[1]
A NAS beside your desk
Enclosure resonance and seek activity need separate assessment.[1]
Latency-sensitive applications
Mechanical storage is capacity-oriented; application response depends on seeks and the whole NAS.[1]
Key hard drive specifications
Full specifications ↗Follow any specification for its full conditions and sources.
Living with it
Capacity, NAS workload and placement
Drive speed is only part of a NAS transfer
The 180 MB/s rating is an internal drive figure. Your NAS processor, network, filesystem, RAID and file sizes determine end-to-end transfers. Small-file applications also encounter mechanical seek delays.[1]
180TB/year workload and the eight-bay design
This model is rated for 180 TB/year of reads and writes. Annual workload is not lifetime writes. Red Plus is designed for up to eight bays; frequent transfers can consume the annual rating even if the drive is not full.[1]
Acoustic ratings and NAS placement
The datasheet lists 21 dBA idle and 26 dBA average seek. These are laboratory ratings, not noise measured at your desk. Mount securely, leave cooling clearance, and avoid relying on brand or family names to predict quietness.[1]
Why 2TB Red Plus has almost no lab trail
The searches did not establish an exact-model original lab test. Specs here come from the September 2025 WD20EFPX column. Merchant pages that quote 175 MB/s instead of 180 MB/s are not used in place of the data sheet.[1]
What still needs a real-world test
We have verified the specifications, but have not found an original test that we can reliably apply to this exact model. The advice above follows the documented features; performance, noise and long-term reliability are not independently established here.
Before you buy
Dated wD20EFPX prices and ownership costs
Dated Newegg $154.99 on 2026-09-08
The Newegg-sold WD20EFPX row is $154.99 from 2026-09-08. Parent primary-sold-by parse of the later saved HTML still shows Sold by Newegg, UnitCost $154.99, ShippingCharge $2.99, so FinalPrice $157.98 is product plus shipping, not a second offer and not a refreshed timestamp. B&H $199.99 is also 2026-09-08. WD.com has no usable USD. Check live sold-by before purchase.[1]
Compare the cost of usable storage
Budget for all drives in the array, backup capacity and eventual replacements. Compare the cost after your chosen redundancy overhead.[1]
Include power and the enclosure
The drive is rated at 2.4 W idle and 4 W read/write at room temperature. Actual consumption depends on operation; the NAS adds its own power.[1]
Verify the offered unit
Check WD20EFPX, one 2 TB drive, new condition, the actual seller and regional warranty. A retailer suffix is preserved in offer notes for verification.[1]
Compare stores for this exact model
One 2 TB WD20EFPX drive ·3.5-inch SATA ·CMR ·5400 RPM Check the total delivered price at the store.
Current price needs checking
Check stores below
6 stores · 0 recent price observations
Newegg
Sold by Newegg
$154.99
Historical price
Stock not confirmed · New
One 2 TB WD20EFPX 3.5-inch SATA internal NAS HDD
Observed shipping: $1.99
Observed Oct 9, 2026, 1:23:41 AM UTC[5]
View exact product at NeweggBest Buy
Sold by Newegg Official
$164.49
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 1:57:21 PM UTC[9]
View exact product at Best BuyWestern Digital
Seller not recorded
$194.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 26, 2026, 4:06:43 PM UTC[7]
View exact product at Western DigitalB&H
Seller not recorded
$199.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 3:10:19 PM UTC[6]
View exact product at B&HAdorama
Seller not recorded
$199.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 4:17:11 AM UTC[8]
View exact product at AdoramaMemoryC
Seller not recorded
Check price
Stock not confirmed · Condition not recorded
Observed Date not confirmed
View exact product at MemoryCPrices are dated observations. Confirm the model, seller, condition, stock and delivered total at the store. Older prices remain visible as history. Links may earn a commission.
Compatibility, capacity and backup questions
Does WD20EFPX use CMR or SMR?
WD20EFPX uses conventional magnetic recording (CMR), according to the manufacturer's specifications.[1]
Does the MTBF rating predict years of life?
No. It is a population estimate under specified workload and temperature conditions, not a promise for one drive.[1]
Does the NAS bay rating mean universal compatibility?
No. Check the exact enclosure, firmware and capacity qualification.[1]
Does RAID replace a backup?
No. Redundancy does not protect against every deletion, malware incident or whole-device loss. Keep an independent copy.[1]
Sources
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
- [1] WD Red Plus HDD data sheet (September 2025) ↗
Checked Sep 11, 2026 · September 2025 p.2 column WD20EFPX; footnotes 1–10
- [2] Newegg WD20EFPX product listing ↗
Checked Sep 8, 2026 · Primary offer sold and shipped by Newegg; Add to cart; limit 2 per customer; new standard listing.
- [3] B&H WD20EFPX product listing ↗
Checked Sep 8, 2026 · MFR WD20EFPX-SPC4TN0; exact base MPN, 2 TB and quantity 1; In Stock and Add to Cart.
- [4] Western Digital WD20EFPX product listing ↗
Checked Sep 8, 2026 · Exact SKU title/model confirmed; price and inventory appear as unresolved template fields. No stock inference from hidden buttons.
- [5] Newegg product price observation ↗
Checked Oct 9, 2026 · newegg-main-item; sha256:432ee3607b843d5c104b10c4823bac4d6c7c8dbada240765eeef28a3115469e4
- [6] B&H product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:181110bc948e5ad5b08dde7c01e205e390e39fc3eb14940aa345fe66f16960f0
- [7] Western Digital product price observation ↗
Checked Sep 26, 2026 · Captured observation; sha256:fc0641dab28d358777ac32e8ac743d9f8b85f0419588be93dd1c3cf65b0c161c
- [8] Adorama product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:92f3dc056e598200410ae024d98d4c681330fc12b8f1cd74140f1593995fba8e
- [9] Best Buy product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:7c4e678608a71b0b674457a0d958f13985d86fde687fa9addb8a61175aefbc5b
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Exact official MPN specifications, power/acoustic/environment columns and footnotes; original test evidence and applicability; primary merchant states and dated retained offers. Partial coverage and original-image/video gaps remain explicit.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)