20 TB hard drive prices
The largest size for single-drive home storage
We compare 19 20 TB hard drives and SSDs from retailers we track. Checkout prices at Amazon and other stores can differ from what we last recorded.
20 TB hard drive prices
Prices last updated: August 14, 2026
- Drives we compare
- 19
- Hard drives (HDD)
- 19
- Cheapest hard drive per TB
- $24.55 per TB: Toshiba X300 PRO 20TB High Workload Performance for Creative Professionals 3.5-Inch Internal Hard Drive – Up to 300 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWR62AXZSTB (20 TB) at $491.00
- 20 TB price per TB range
- $24.55 to $43.05
Best value 20 TB drives
- Toshiba X300 PRO 20TB High Workload Performance for Creative Professionals 3.5-Inch Internal Hard Drive – Up to 300 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWR62AXZSTB (20 TB) at $491.00 ($24.55 per TB)
- Seagate (Recertified IronWolf Pro 20TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage (ST20000NT001) (20 TB) at $510.00 ($25.50 per TB)
- Seagate Exos 20TB 7.2K RPM SATA 6Gb/s 3.5in Enterprise HDD ST20000NM002C (Renewed) (20 TB) at $510.00 ($25.50 per TB)
- Seagate Expansion 20TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP20000400) (20 TB) at $534.00 ($26.70 per TB)
20 TB hard drive buying guide
Who a 20 TB drive is for
20 TB targets the most storage per bay in supported NAS units, long-retention video, and archive servers where adding another chassis is undesirable.
20 TB hard drive vs SSD
Value shopping here is usually HDD-first. SSDs near this capacity are specialty items, so plan HDD pools plus smaller fast SSDs.
What to look for in a 20 TB drive
- Firmware branch: NAS, enterprise, or desktop, not always interchangeable.
- Warranty and advance replacement for business-critical pools.
- Cooling and staggered spin-up on large JBOD shelves.
- Price per TB vs two 10 TB drives, sometimes two smaller disks cost less upfront.
How we compare 20 TB prices
20 TB is the top end of what we list for home builds. Use price per TB on this page to compare against other sizes you are considering.
20 TB price per TB on this page
Among 18 drives we compare on this page, price per TB runs from about $24.55 to $43.05. Checkout totals and coupons can differ.
Compare all 20 TB hard drive prices
20 TB hard drive questions
20 TB drives in a five-bay NAS?
Physically yes if the vendor supports the size. Usable space depends on RAID mode, SHR-2 or RAID 6 is common when a single disk loss must not threaten the pool.
Is 20 TB worth it vs two 10 TB?
If price per TB is equal and bays are scarce, 20 TB wins. If 10 TB is on sale, two drives can be cheaper and spread rebuild risk across smaller units.
How heavy is a 20 TB HDD?
Often 650 g or more for 3.5-inch models. Support the drive by the sides when installing and use screws rated for the vibration.
How many 20 TB drives are on this page?
We compare 19 20 TB hard drives and SSDs on this page, including nearby capacities within about 5% of 20 TB.
What do 20 TB drives cost on this page?
Among comparable storage drives on this page, prices run from about $491.00 (Toshiba X300 PRO 20TB High Workload Performance for Creative Professionals 3.5-Inch Internal Hard Drive – Up to 300 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWR62AXZSTB (20 TB)) up to $861.00 (Seagate Exos X20 ST20000NM003D 20TB 7200 RPM SAS 12Gb/s 512e 256MB SED 3.5in Enterprise Hard Drive (Renewed) (20 TB)), before shipping or coupons.
What is the 20 TB price per TB on this page?
About $24.55 to $43.05 per TB across 18 drives we use for this summary.
Cheapest 20 TB HDD on this page?
Toshiba X300 PRO 20TB High Workload Performance for Creative Professionals 3.5-Inch Internal Hard Drive – Up to 300 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWR62AXZSTB (20 TB) at $491.00 (about $24.55 per TB).