Our take
WD My Passport WDBYFT0040BBL-WESN is a blue 4TB portable hard drive for someone who needs a large nominal capacity and a documented USB 3.0 connection that also has a USB 2.0 path. Office Depot additionally describes a password and 256-bit AES hardware-encryption feature, which may matter when carrying files away from a desk. Those facts identify a useful older-host and data-protection combination, but do not establish a current Amazon offer, the setup software available today, the power arrangement, or the condition of any particular unit. Confirm those details before relying on the drive for an ongoing workflow.
A buyer seeking a blue, high-capacity portable HDD for a USB 3.0 or USB 2.0 host who values the retailer-listed password/AES feature and will verify the current unit's power, cable, software, and exact offer.
A buyer who requires proven bus power or a no-outlet setup, current operating-system or encryption-software support, a confirmed included cable, current console compatibility, a direct verified Amazon ASIN, or a known condition for an individual drive.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Office Depot and Best Buy independently identify the exact WDBYFT0040BBL-WESN as a blue 4TB portable hard drive.
- Office Depot lists USB 3.0 and backward compatibility with USB 2.0 hosts.
- Office Depot describes password-enabled 256-bit AES hardware encryption for the exact model page.
What to weigh up
- Neither saved page establishes whether this exact unit is bus-powered or needs a separate supply, or which cable a present seller includes.
- The Office Depot page's Windows 10 field and backup-software wording do not establish current operating-system or software support.
- Historical ASIN B089PMMT1X remains unverified as a current exact Amazon offer; no measured performance or console use is documented.
Specifications and exact model details
The key details
| Model covered | WDBYFT0040BBL-WESN |
|---|---|
| Advertised capacity | 4TB nominal advertised capacity; formatted usable space will be lower |
| Drive configuration | Blue portable external hard disk drive |
| Host connection | USB 3.0 interface with listed USB 2.0 backward compatibility |
Performance figures are manufacturer claims. Source checked October 15, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
Which blue 4TB model does the code identify?
The full code matters because My Passport is a family name used across capacities and colors. Office Depot maps WDBYFT0040BBL-WESN to a blue 4TB portable external hard drive, and Best Buy independently uses the same code for its blue 4TB USB 3.0 portable model. Keep that suffix with the blue 4TB configuration when comparing an offer. Do not substitute details from the separately listed red WDBPKJ0040BRD-WESN or other My Passport capacities. A later row that describes a renewed blue drive is a reuse of this hardware identity; its condition wording does not prove the condition of a present unit. The historical ASIN is only a saved source-row clue, not a current product-page crosswalk. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 17–23 and 53–72; [Best Buy exact-model page](https://www.bestbuy.com/product/wd-my-passport-4tb-external-usb-3-0-portable-hard-drive-blue/JXTHCJ5YXT), lines 1508–1516; checked 2026-10-15.)
Is 4TB the right amount for the archive?
The listed 4TB capacity gives this portable HDD room for a sizable collection of files, photos, or media while keeping the drive in a portable category rather than a desktop enclosure. Capacity is advertised, and formatted space will be lower; the pages do not give an exact usable-space figure. Think about how the data will be organized and backed up before choosing one large drive as an archive. A single external disk is still one copy, so retain another copy of important files. This model's nominal capacity is substantially above the 400GB and 1TB floors in the finder, but capacity alone says nothing about an individual drive's health or how quickly a real workload will finish. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 42–44 and 53–56; checked 2026-10-15.)
What host connections are documented?
Office Depot lists a USB 3.0 interface and says it is backward compatible with USB 2.0; Best Buy's exact-model title also identifies USB 3.0. That gives a documented connection path for a USB 3.0 computer and a backward-compatible path for a USB 2.0 host, subject to the port and cable on the particular setup. A USB 2.0 host remains the older connection in that pairing. These interface labels do not provide a measured copy speed for a computer, file set, or individual unit. The pages do not establish Thunderbolt, FireWire, RAID, network, or direct-to-TV use, so do not choose this model for those requirements based on its My Passport name. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 42–45 and 53–59; [Best Buy exact-model page](https://www.bestbuy.com/product/wd-my-passport-4tb-external-usb-3-0-portable-hard-drive-blue/JXTHCJ5YXT), lines 1508–1510; checked 2026-10-15.)
What does the AES-256 description establish?
Office Depot says the drive can use a password with 256-bit AES hardware encryption. That is a specific retailer-described feature of this model page and a reason a file-carrying buyer may compare it with otherwise similar capacity and interface choices. The source does not name the current encryption utility or establish that the required software is available and compatible with today's computer. If the encryption workflow is important, verify the current setup instructions, supported system, and how the intended users will manage access before placing sensitive files on the drive. Do not treat the feature description as a guarantee against loss, accidental deletion, device failure, or every security threat. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 45–47 and 69–70; checked 2026-10-15.)
Check power, cable, and software as separate questions
The exact pages identify this as portable storage and list its USB interface, but they do not state whether the drive runs from USB power or needs another supply. They also do not confirm which cable accompanies a present seller's unit. Do not turn the word portable into a bus-power claim. Office Depot's specification table lists Windows 10 and software included; those fields describe that retailer page and do not establish present-day Windows, Mac, encryption-utility, or backup-software support. A buyer who needs a particular host, one-cable travel arrangement, or encryption workflow should check those details against current instructions and the actual item offered. The finder therefore keeps the power question open for this model rather than treating it as a verified no-outlet choice. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 42–49 and 60–64; checked 2026-10-15.)
How to check a current offer
The source row preserves historical ASIN B089PMMT1X, but the saved evidence does not establish that it is a current exact Amazon listing for this blue SKU. The affiliate destination is a tagged Amazon search for WDBYFT0040BBL-WESN, not a direct ASIN link. Compare the full model code, blue finish, and 4TB capacity on the offer page, then confirm the item condition, seller cable, power needs, return terms, and any software required for your host. Best Buy's page status applies to that retailer's new-condition listing only; it does not establish Amazon stock or general market availability. No current price, stock, measured speed, buyer-review summary, or warranty claim is used here. ([Office Depot exact-model listing](https://www.officedepot.com/a/products/735899/WD-My-Passport-4TB-Portable-External/), lines 53–72; [Best Buy exact-model page](https://www.bestbuy.com/product/wd-my-passport-4tb-external-usb-3-0-portable-hard-drive-blue/JXTHCJ5YXT), lines 1508–1516; checked 2026-10-15.)
Compare for your needs
Find the external drive that fits you.
Tell us what matters. We’ll help you weigh the options.
Before you buy
Does WDBYFT0040BBL-WESN identify the blue 4TB model?
Yes. Office Depot and Best Buy identify that full model code with the blue 4TB portable My Passport hard drive.
Can it connect to a USB 2.0 host?
Office Depot lists USB 2.0 backward compatibility. Confirm the port and cable on the unit you are considering; no file-copy speed is measured here.
Does Office Depot document hardware encryption?
The page describes password-enabled 256-bit AES hardware encryption. It does not establish current utility availability or current operating-system support.
Is it confirmed bus-powered?
No. The saved exact-model pages do not establish whether the drive is powered by USB or needs a separate supply.
Is historical ASIN B089PMMT1X a current Amazon offer?
That ASIN remains an unverified historical reference. Use the tagged search for WDBYFT0040BBL-WESN and check the exact current listing and unit.
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 and review basis
Sources & review basis
We use the linked product documentation for the features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Office Depot exact-model page; Best Buy exact-model identification ↗ — checked October 15, 2026.
- Office Depot exact-model listing, checked 2026-10-15. Lines 17–23 identify the blue 4TB portable hard drive; lines 42–49 describe the 4TB capacity, USB 3.0 with USB 2.0 backward compatibility, password-enabled 256-bit AES hardware encryption, and backup options; lines 53–72 map WDBYFT0040BBL-WESN to the blue 4TB model and list the page's Windows 10 compatibility field. ↗ — checked October 15, 2026.
- Best Buy exact-model page, checked 2026-10-15. Lines 1508–1516 identify the blue 4TB USB 3.0 portable drive and model WDBYFT0040BBL-WESN; its new-condition status applies to Best Buy's page only and is not an Amazon availability claim. Customer reviews are not used. ↗ — checked October 15, 2026.
Is it the right fit?
Check the exact model and today’s offers on Amazon.