Best 24TB Hard Drives of 2026

Not everyone has a free drive bay, and the Novus is the answer for those who don't: 24 TB you plug into a laptop and see in Finder or File Explorer seconds later. We like it for the person whose footage, game library, or project archive has outgrown a shelf of small drives and who wants the capacity without opening a case.

Inside sits a 7200 rpm enterprise drive — the same class of mechanism as the internal picks here — in an aluminum enclosure wrapped in a silicone sleeve. That sleeve is a small thing we appreciated: the unit sits still on a desk instead of buzzing its way across it, and it shrugs off being carried between rooms. Outside you get USB-C, and Oyen states compatibility with USB and with Thunderbolt 3, 4, and 5, which covers Macs and PCs alike. Oyen's own transfer rating is up to 270 MB/s.

The three-year warranty is what separates it from the enclosures sold purely on price. Most desktop boxes come with a year and a drive you can't identify; here you know what's spinning inside and you have cover for three years. One quirk to test in your first week: the drive can need unplugging and replugging if the computer sleeps and doesn't wake it cleanly — a nuisance rather than a fault, and easy to live with once you know the fix. Ours came with its cable, so it's genuinely a plug-in-and-go purchase.

A surveillance recorder is the hardest ordinary life a hard drive can have: eight or ten cameras writing around the clock, week after week, with almost no idle time and almost no reads. Western Digital builds the Purple Pro for exactly that pattern, and the specification sheet reads like it.

AllFrame is the surveillance-specific part — it manages how the drive writes so playback doesn't stutter and frames don't drop out of the recording — and a 550 TB/year workload rating, 512 MB of cache, and a 2.5-million-hour MTBF figure back up the claim that this one is meant to run continuously. We reach for it whenever someone is sizing a recorder rather than a desktop, and we think the five-year warranty is what justifies the premium: an NVR in a cupboard is easy to forget about until the footage you need isn't there.

Sizing matters more than the model here. Work back from your recorder's daily write rate — most NVR software will show it, or you can watch the storage screen for a day — then decide how many days of retention you want before the drive starts overwriting. Twenty-four terabytes buys a lot of days, but the number depends on camera count, resolution, and bitrate, not on the drive.

One boundary worth stating plainly: this is a recorder drive. Put it in a gaming tower and it works, but you're paying for firmware tuning a desktop never uses. For general-purpose storage or a backup enclosure, one of the CMR desktop-class drives here is the better spend.

The first thing to check on a Gold drive isn't on the spec sheet — it's the seller. Western Digital's five-year coverage depends on the drive being retail-pack stock, and Gold drives sold as OEM units have turned up without it, which you discover when the serial won't register. Buy from a seller that states the warranty, and register the serial the day the drive lands.

What you're buying underneath is a drive built for arrays. OptiNAND puts some of the drive's own metadata on flash, the cache runs to 512 MB, and the platters spin at 7200 rpm; Western Digital positions it for RAID and JBOD sets, high-uptime workloads, and machines that never get switched off. Sequential transfer sits in the same territory as the other 7200 rpm drives here, so what you're really paying for is the duty rating and the electronics rather than raw speed.

Where it earns a place in this guide is the middle ground. It's less expensive than the surveillance drive, more purpose-built than a desktop model, and rated for the rebuilds and parity checks a RAID array inflicts on a disk. For a home server, a small-business box, or a NAS you're building from parts, that makes it the sensible third option between the IronWolf Pro and the renewed Exos.

Two habits go with it. In a striped array, a single drive is a liability rather than a backup, so buy in pairs or keep a copy elsewhere. And give the chassis airflow — enterprise drives are happiest with steady, cool air moving past them, which is also the cheapest way to get a long service life out of one.

Ninety days. That's the warranty on this Exos, and it's the honest frame for everything else about it: this is a renewed enterprise drive, which means it has already been someone's, and the price reflects that. If that sentence doesn't put you off, it's the least expensive way to add 24 TB here by a clear margin.

What arrives is a real Exos: helium-sealed, CMR, 7200 rpm, SATA 6 Gb/s, rated when new for 24/7 duty and a 2.5-million-hour MTBF, with a stated 285 MB/s transfer rate. The helium sealing is worth knowing about because it's how these big drives keep platters spinning with less drag and less power — the same engineering as the new enterprise drives, at used prices.

We treat one of these as a copy, not as the copy. In a redundant array, where any single failure is survivable, or as an archive of files that also exist somewhere else, the 90-day window stops mattering much. As the only home for a decade of photos and video, you're one bad week away from a recovery bill that dwarfs what you saved.

It ships in an ESD bag with nothing else — no cable, no screws, no software — so have a SATA cable and an open bay ready before it lands. Run a full surface scan the day it arrives and check the health report before you copy anything across; a renewed drive that's going to fail usually tells you in the first day, and a scan is the cheapest test you'll ever run.