Our take
Consider WD Elements Portable WDE1MSBK4000BN if a 400GB portable hard drive with USB 2.0 matches a defined legacy setup. The exact-model evidence gives a useful, narrow specification: 400GB, a 2.5-inch portable form, and a USB 2.0 interface. Its tradeoff is that both the capacity and interface are modest by current standards, while power behavior and current host support remain unverified. Check the full code, the seller's unit condition, cable and power details, and compatibility with the computer you plan to use.
A buyer who needs a modest 400GB portable HDD with a documented USB 2.0 interface and can verify power, condition, and current host compatibility before relying on it.
A buyer who requires USB 3.0 or newer, more than 400GB in one drive, confirmed bus power, a specific included cable, or documented current compatibility with a named computer, console, television, or backup application.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact code WDE1MSBK4000BN is tied to the WD Elements Portable 400GB USB 2.0 configuration in the saved listing evidence.
- The 2.5-inch portable HDD form is relevant to a smaller movable setup, though exact dimensions and weight are not documented here.
- A native USB 2.0 interface can fit a buyer whose required host connection is USB 2.0.
What to weigh up
- 400GB nominal capacity leaves less room for a growing photo, video, or backup collection than the larger drives in this comparison.
- USB 2.0 does not meet a USB 3.0 interface requirement, and the interface name is not a measured copy-speed result.
- Power behavior, current host support, package, cable, unit condition, warranty, and current Amazon mapping are not established.
The key details
| Model covered | WDE1MSBK4000BN; black; 400GB |
|---|---|
| Advertised capacity | 400GB nominal advertised capacity |
| Drive configuration | 2.5-inch portable external HDD; power arrangement unknown |
| Host connection | USB 2.0 |
Performance figures are manufacturer claims. Source checked October 12, 2026. Regional models and included accessories can differ.
What the features mean for you
Is this the exact Elements Portable model?
The Elements family name covers multiple generations and capacities, so compare the complete code rather than the family label alone. The saved Newegg indexed heading and specification table identify WDE1MSBK4000BN as an Elements Portable 400GB, USB 2.0, 2.5-inch configuration. ManualOwl's index independently locates the exact model and its specification and quick-install documents. These records support the model boundary, but they do not prove that historical ASIN B001NGB75M is a current offer for this exact unit. The related family datasheet uses the shorter code WDE1MS4000BN; its missing BK characters are not used to infer this row's suffix. ([Newegg exact-model listing](https://www.newegg.com/wd-elements-portable-400gb/p/N82E16822136340) and [ManualOwl exact-model index](https://www.manualowl.com/p/Western%20Digital/WDE1MSBK4000BN/Manual/15475), checked 2026-10-12.)
Will 400GB be enough for the archive?
The listing gives 400GB as the advertised capacity. That can suit a limited set of documents, older projects, or occasional transfers when you do not need a large single-drive library. It leaves less room than the 500GB, 1TB, and larger models in the reviewed pool, so compare the size of the files you expect to keep and allow room for growth before choosing it. The saved sources do not state formatted free space; do not read the advertised capacity as an exact amount available for files. If the archive already exceeds this floor, choose a documented larger-capacity model rather than depending on compression or later expansion that has not been verified. ([Newegg exact-model listing](https://www.newegg.com/wd-elements-portable-400gb/p/N82E16822136340), checked 2026-10-12.)
Does USB 2.0 fit the host you have?
The exact model listing names USB 2.0. That gives it a documented fit for a USB 2.0 host requirement and the saved 400GB minimum-capacity comparison. It is not a USB 3.0 drive. USB 2.0 is a connection specification, not a promise about real-world copying time; no workload or transfer test was performed for this product. The evidence also does not establish the cable supplied with a present unit or whether a particular current computer and operating system will recognize it. Check the port, cable, file system, and host support before building a workflow around this drive. ([Newegg exact-model listing](https://www.newegg.com/wd-elements-portable-400gb/p/N82E16822136340), checked 2026-10-12.)
What do portability and power mean here?
The listing identifies a 2.5-inch portable drive, which is useful when a smaller movable setup matters. That specification alone does not establish bus power, cable type, physical dimensions, weight, shock resistance, or the condition of a used unit. If you need a one-cable setup or want to use the drive away from an outlet, verify the power arrangement and included accessories for the exact unit. The saved evidence does not say whether an adapter is required. Do not infer power from the 2.5-inch size or transfer details from a newer WD Elements generation. ([Newegg exact-model listing](https://www.newegg.com/wd-elements-portable-400gb/p/N82E16822136340), checked 2026-10-12.)
How should it fit into a backup routine?
This is one external hard drive, not redundant storage. It can serve as an extra copy or a transfer device, but important files should also remain on another independent drive or service. The saved records contain no hands-on reliability test, health report for a particular unit, or buyer-review summary. With an older drive, inspect the item's actual condition and test it with noncritical data before trusting it with the only copy of anything important. Those steps are practical precautions, not a claim about a measured failure rate for this model. Current backup software and operating-system support are not documented in the saved source evidence.
What should you verify before buying?
Historical ASIN B001NGB75M records the source row; it does not establish that a present Amazon result has the same model, condition, seller package, or warranty. Use the tagged exact-model search and compare WDE1MSBK4000BN and 400GB on the offer. Check the actual unit's condition, included cable, power requirement, return terms, and compatibility with your host. The saved Newegg search result displayed an out-of-stock label, but no availability claim is made for another seller or offer. No current price, stock, sales rank, or offer status is asserted here. ([Newegg exact-model listing](https://www.newegg.com/wd-elements-portable-400gb/p/N82E16822136340) and [ManualOwl exact-model index](https://www.manualowl.com/p/Western%20Digital/WDE1MSBK4000BN/Manual/15475), checked 2026-10-12.)
What else to compare
Before you buy
Is WDE1MSBK4000BN the 400GB USB 2.0 portable model?
The saved exact-model listing identifies it as a WD Elements Portable 400GB drive with a USB 2.0 interface and a 2.5-inch form factor.
Will it work with my current computer?
The saved evidence does not establish current operating-system support. Confirm the computer's port, cable, file system, and support before relying on it.
Does this model run from USB power alone?
That is unknown in the saved sources. Verify the power arrangement and included cable for the specific unit.
Does historical ASIN B001NGB75M identify today's Amazon offer?
No. Use the tagged exact-model search and verify the model code and condition on the offer page.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Newegg exact-model indexed listing checked 2026-10-12; direct page retrieval returned a cache miss ↗ — checked October 12, 2026.
- Newegg exact-model indexed title and specification table identify WDE1MSBK4000BN as a 400GB USB 2.0, 2.5-inch portable drive. The search result showed an out-of-stock label that is not generalized to other offers; direct retrieval returned a cache miss. ↗ — checked October 12, 2026.
- ManualOwl exact-model index identifies WDE1MSBK4000BN as an Elements Portable 400GB model and lists specification and quick-install documents; used as a model/document locator only because direct retrieval was unavailable. ↗ — checked October 12, 2026.
The decision
Consider WD Elements Portable WDE1MSBK4000BN if a 400GB portable hard drive with USB 2.0 matches a defined legacy setup. The exact-model evidence gives a useful, narrow specification: 400GB, a 2.5-inch portable form, and a USB 2.0 interface. Its tradeoff is that both the capacity and interface are modest by current standards, while power behavior and current host support remain unverified. Check the full code, the seller's unit condition, cable and power details, and compatibility with the computer you plan to use.
Is it the right fit?
Check the exact model and today’s offers on Amazon.