Western Digital WD My Book 4TB vs Western Digital WD My Passport 4TB
Western Digital WD My Passport 4TB is at least the equal of the other on every measure that decides this, and ahead on at least one.
| Specification | Western DigitalWD My Book 4TB | Western DigitalWD My Passport 4TB |
|---|---|---|
| Capacity (GB) | 4000 | 4000 |
| Current best price | $268.90at Amazon.com · captured 2026-09-13 | $181.50betterat Amazon.com · captured 2026-09-13 |
| Price per TB | $67.23 | $45.38better |
| Form factor | 3.5-inch | 2.5-inch |
| Warranty (years) | 3 | 3 |
How these two compare
Price
Western Digital WD My Book 4TB is $268.90 ($67.23 per TB); Western Digital WD My Passport 4TB is $181.50 ($45.38 per TB).
Form factor
Western Digital WD My Book 4TB is 3.5-inch and Western Digital WD My Passport 4TB is 2.5-inch. A 3.5" drive fits a desktop bay; a 2.5" drive fits a laptop or a compact enclosure — the two are not a physical swap for each other.
Warranty
Western Digital WD My Book 4TB is warranted for 3 years, Western Digital WD My Passport 4TB for 3. The cover is the maker's own commitment; a longer one usually signals a drive built for heavier duty, though it is the mechanism, not the paperwork, that has to last.
Which to buy
Against the other, Western Digital WD My Passport 4TB is even or ahead on every tracked measure and behind on none, the one case where the choice needs no compromise.
Common questions about this pair
- Which is faster, Western Digital WD My Book 4TB or Western Digital WD My Passport 4TB?
- Both quote 0 MB/s read — Western Digital WD My Book 4TB at 0 MB/s write, Western Digital WD My Passport 4TB at 0 MB/s — so throughput does not separate them on the number vendors print. Sequential rate on a spinning disk comes down to platter speed and density, and reading and writing land close together.
- Which costs less per terabyte, Western Digital WD My Book 4TB or Western Digital WD My Passport 4TB?
- Western Digital WD My Book 4TB is $268.90 ($67.23 per TB); Western Digital WD My Passport 4TB is $181.50 ($45.38 per TB).
- Should you buy Western Digital WD My Book 4TB or Western Digital WD My Passport 4TB?
- Against the other, Western Digital WD My Passport 4TB is even or ahead on every tracked measure and behind on none, the one case where the choice needs no compromise.