The cheapest 10TB hard drive in stock right now is the HGST Ultrastar He10 10TB SAS 12G at $23.50/TB ($235.00 total, Refurb). 49 of 57 tracked 10TB drives are in stock, with new starting at $37.17/TB and refurbished at $23.50/TB.
The best-stocked capacity we track, by some distance. 10TB nearline drives came out of hyperscale deployments in volume and the recertified supply is deep, which makes this tier consistently one of the strongest $/TB positions on the site. Helium-sealed and CMR across every enterprise line at this capacity.
10TB is the best value we track today - the lowest matched-interface $/TB of any HDD capacity on this site right now, at $23.55/TB across 36 in-stock listings. See the full value-frontier curve for how every capacity compares.
One 10TB hard drive, in decimal units (1TB = 1,000GB), before file-system and RAID overhead. Each line is a division you can redo; the per-file sizes are our assumptions and say so.
Security cameras, recording continuously: 289 camera-days - 8 cameras for 36 days. The arithmetic: 3.2 Mbps ÷ 8 = 0.4 MB/s × 86,400 s = 34.56 GB per camera-day; 10,000 GB ÷ 34.56 = 289 camera-days. The bitrate is WD's reference figure for one stream (single stream, 1080p, h.265, 25fps), from WD Purple / WD Purple Pro data sheets (footnote 3); the 8-camera count is our example. A camera set to a higher bitrate fills the drive proportionally faster.
Guides for this capacity: best 10TB hard drive · the HDD price forecast · fill a NAS at today's prices
Every listing we track at this size - 34 product pages, including ones with no current offer. Out-of-stock pages carry specs and in-stock alternatives, never a stale price.
At the 10TB capacity tier, the refurbished market typically prices 20-30% below new drive equivalents. Right now, the cheapest new 10TB drive is WD Ultrastar 10TB SATA HUH721010ALN600 at $37.17/TB and the cheapest refurbished is HGST Ultrastar He10 10TB SAS 12G at $23.50/TB — a 37% discount for refurb. For backup repositories, RAID 6 capacity tiers, and any deployment with redundancy, refurbished is the right answer. For primary production storage and single-drive deployments, the new drive premium buys peace of mind through full manufacturer warranty and zero accumulated wear.
Established refurbished resellers like MDD MaxDigitalData source from decommissioned hyperscale datacenters and provide 3-5 year reseller warranties at this capacity. Run smartctl on arrival, deploy in RAID 6 with at least one hot spare, and monitor SMART attributes continuously.
Production NAS, ZFS RAIDZ2 vdevs, Veeam repositories and Plex libraries in the 30-60TB usable range. The depth of recertified supply also makes 10TB the easiest capacity to buy spares for.
RAID guidance: RAID 6 with a hot spare. Rebuild windows run long enough at 10TB that single-parity protection is no longer a reasonable bet, and the deep spares market makes the hot spare cheap. Use the RAID Capacity Planner to calculate exact usable capacity for any configuration at this capacity.
Power draw: 10TB enterprise SATA drives typically draw 6-9W active, 4-5W idle. Six 10TB drives in a NAS array consume approximately 35-55W active — modest by enterprise standards but meaningful for home electricity costs over years of operation.
When to size up: If your projected capacity growth over the next 24 months would exceed the array's usable capacity at 10TB drives, sizing up one tier (14TB or larger) defers the next expansion cycle and typically improves $/TB. Sizing down rarely makes financial sense unless bay count is the binding constraint.
10TB is the strongest position on this site and it is worth understanding why. Hyperscale operators deployed 10TB helium drives in enormous volume around 2017-2019, and those fleets have now been retired, so recertified supply is deeper here than at any other capacity — we track more in-stock listings at 10TB than at any other size. That depth does two useful things: it pushes $/TB down, and it makes spares easy to source years into a deployment, which matters more than the headline price when you are running an array. Every enterprise 10TB drive is helium-sealed and CMR. RAID 6 is the right configuration at this capacity; rebuild windows are long enough that single parity is no longer a reasonable bet.
Usable capacity examples for 10TB drives at common deployment sizes, using RAID 5 (single parity, one drive of overhead) and RAID 6 (dual parity, two drives of overhead):
| Drives | Raw | RAID 5 usable | RAID 6 usable |
|---|---|---|---|
| 4 drives | 40TB | 30TB | 20TB |
| 6 drives | 60TB | 50TB | 40TB |
| 8 drives | 80TB | 70TB | 60TB |
| 10 drives | 100TB | 90TB | 80TB |
| 12 drives | 120TB | 110TB | 100TB |
At 10TB per drive, RAID 5 remains acceptable for non-critical deployments because rebuild windows are short and URE risk is manageable. For production storage, RAID 6 still provides better protection at modest capacity cost.
Rebuild time for a 10TB drive in a RAID 6 array typically runs 30-50 hours at typical hardware-accelerated rebuild speeds (assuming the array is not heavily loaded with production traffic during rebuild). Throughout the rebuild window, the array operates at degraded performance and reduced redundancy. Hot spare drives that automatically begin rebuild on first failure shrink the exposure window to minutes rather than hours. Use the RAID Capacity Planner to model rebuild times for your specific drive count and array configuration.
Enterprise 10TB SATA hard drives typically draw 6-10W during active read/write and 4-5W at idle. For a 6-drive array running 24/7 with mixed activity, expect approximately 35-55W of continuous power draw plus the host system's overhead. At typical US residential electricity rates of $0.16/kWh, a 45W array costs about $63 per year in electricity; at commercial rates of $0.10/kWh, about $39 per year.
Fewer high-capacity drives dramatically reduce power consumption per terabyte stored. Six 10TB drives delivering 40TB usable in RAID 6 consume the same power as six 4TB drives delivering only 16TB usable — but at 250% of the capacity per watt. For datacenter and homelab deployments where electricity is a meaningful operating cost, sizing up to 10TB drives delivers better power efficiency per TB stored alongside the $/TB advantage. The TCO Calculator models the full 5-year power cost for any drive configuration.
Enterprise hard drive prices have risen approximately 46-50% since September 2025, driven by AI infrastructure demand absorbing hyperscale HDD production, US import tariffs adding 10-13% to landed costs, and NAND shortages forcing buyers from SSD to HDD for capacity tiers. Smaller capacity tiers including 10TB have seen more modest 15-30% increases as they are less directly consumed by hyperscale AI workloads. Refurbished supply at this capacity remains ample from older hyperscale decommissions. Read the full analysis in Hard Drive Prices Up 50% in 2026.
Most storage analysts expect elevated pricing to persist through 2026 and into 2027. New NAND capacity takes 2-3 years to qualify and ramp; hyperscale AI buildouts are not expected to moderate before late 2026. For 10TB buyers in particular, the practical procurement advice is to purchase current requirements at today's prices rather than deferring in anticipation of price normalization. Monitor live $/TB on this page and on the cheapest per TB tracker for the current best deal at this capacity.
As of the most recent refresh, the cheapest 10TB hard drive on DatacenterDisk is the HGST Ultrastar He10 10TB SAS 12G at $23.50/TB ($235.00 total). Prices update about once a day; check the live table above for the current winner.
10TB is appropriate for single-drive external backups, small business document storage, or as a starting point for first-time NAS buyers. For Plex or production NAS, sizes above 16TB deliver meaningfully better $/TB and longer service life.
All current 10TB enterprise and NAS-branded hard drives use Conventional Magnetic Recording (CMR) and are safe for RAID arrays. SMR is only found in some smaller capacity (≤8TB) consumer drives. Both Seagate Exos and WD Ultrastar at 10TB are CMR.
Cheapest new 10TB right now: WD Ultrastar 10TB SATA HUH721010ALN600 at $37.17/TB with full manufacturer warranty. Cheapest refurbished: HGST Ultrastar He10 10TB SAS 12G at $23.50/TB with reseller warranty. Refurbished is appropriate for RAID 6 backup and capacity tiers; new for primary production storage.
Live market shows 10TB drives starting at $23.50/TB ($235.00 total for the cheapest in-stock listing). For new enterprise CMR drives at this capacity, expect $31-35/TB depending on brand and series. The DatacenterDisk live tracker has the most current pricing.
At 10TB capacity, NAS-specific lines are limited. Look for CMR drives only — verify recording technology on the manufacturer spec sheet before purchasing. Seagate IronWolf, WD Red Plus (NOT WD Red), and Toshiba N300 are the safe NAS-branded options.
Want one answer instead of the whole catalogue? Today's verdict at this capacity → names the current best by cost per terabyte, with the criterion and the runner-up.