Prime Big Deal Days External Hard Drive Deals, Measured

Shucking, computed live: external vs bare, per TB

New against new on both sides, current prices only. The price is half the question - warranty and which drive is inside are the other half; see the shucking guide.

What to watch in external drives this event

External hard drives are a desktop-and-backup purchase, and they are one of the few categories where an event can move the price that actually matters. The drives inside are high-volume consumer and nearline units, the enclosures are cheap, and retailers use high-capacity desktop externals as visible event traffic-drivers. That is also why they are worth checking against their own history rather than trusted on sight: a drive promoted in every banner is not necessarily cheaper than it was last month.

Two families behave differently. Desktop externals - the WD My Book, Seagate Expansion Desktop and similar - hold 3.5-inch drives, need wall power and reach the high capacities where cost per terabyte is lowest. Portable externals hold 2.5-inch drives, run on bus power, top out much lower and cost more per terabyte. If you are buying capacity for backup at a desk, the desktop family is almost always the one to compare; if you are buying something to carry, compare portables with each other, not with a desktop unit.

Our external catalogue runs a fraud floor before anything is displayed: a listing claiming a capacity at a price below what any real drive of that size costs is dropped outright rather than shown with a warning, because a sub-floor capacity claim is not a product. Listings priced wildly above their family's median are flagged as scalper pricing and kept out of every ranking. The table above has already been through both filters.

Capacity sweet spots shift. At some sizes a desktop external undercuts the same capacity sold as a bare internal drive; at others it does not. The panel on this page computes that live at every capacity where we hold both, which is the only honest way to answer the shucking question during an event.

Shucking during an event: the arithmetic, not the folklore

Shucking means buying an external drive for the bare drive inside and discarding the enclosure. It became popular because, for years, high-capacity desktop externals were routinely cheaper per terabyte than the same capacity bought bare. That was a market condition, not a law, and it has not held reliably in 2026. The comparison above sets the cheapest in-stock external at each capacity against the cheapest new bare internal SATA drive at the same capacity, new against new on both sides - a used bare drive against a new external would make shucking look worse than it is, and the reverse would flatter it.

Three costs sit outside the price. The drive inside an external is not always the model enthusiasts expect, and which one you get is not something the listing guarantees. Opening the enclosure can affect warranty coverage, and the drive's warranty through the external channel is often shorter than a bare drive's. And some externals use a USB bridge soldered to the drive's board, which rules the drive out for internal use entirely. Our shucking guide covers each; none of them shows up in a per-terabyte number.

So read the panel as necessary but not sufficient. A capacity where the external is cheaper is a capacity where shucking can be worth considering; a capacity where the bare drive is cheaper is one where shucking costs you money and warranty for nothing.

The trap: a headline price on the wrong family

The event trap here is comparing across families without noticing. A portable 5TB and a desktop 8TB can appear side by side in the same deal carousel, and a buyer comparing total prices will see the portable as cheaper when the desktop is far cheaper per terabyte. The opposite mistake is buying a desktop unit for a laptop bag. Decide the family first, then compare per terabyte within it.

The second trap is buying to shuck at a capacity where it does not pay. The panel above says, at each capacity, whether the external or the bare drive is cheaper per terabyte today. If it says bare, buy bare.

Frequently asked questions