18 TB hard drive prices
High-capacity drives when you want fewer disks in the chassis
We compare 29 18 TB hard drives and SSDs from retailers we track. Checkout prices at Amazon and other stores can differ from what we last recorded.
18 TB hard drive prices
Prices last updated: August 14, 2026
- Drives we compare
- 29
- Hard drives (HDD)
- 29
- Cheapest hard drive per TB
- $16.67 per TB: MDD MAXDIGITALDATA X18 MACH.2 (Dual Actuator) 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (MDD18TSAS51272E-2X18) - [Not a SATA HDD] (Renewed) (18 TB) at $300.00
- 18 TB price per TB range
- $16.67 to $40.28
Best value 18 TB drives
- MDD MAXDIGITALDATA X18 MACH.2 (Dual Actuator) 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (MDD18TSAS51272E-2X18) - [Not a SATA HDD] (Renewed) (18 TB) at $300.00 ($16.67 per TB)
- MDD MAXDIGITALDATA MDD 18TB 7200RPM 256MB Cache SAS 12.0Gb/s 3.5inch Internal Enterprise Hard Drive (MDD18TSAS25672E) - [Not a SATA HDD] (Renewed) (18 TB) at $320.00 ($17.78 per TB)
- MDD 18TB 7200RPM 256MB Cache SAS 12.0Gb/s 3.5inch Internal Enterprise Hard Drive (MDD18TSAS25672E) - 5 Years Warranty (18 TB) at $340.00 ($18.89 per TB)
- Seagate Enterprise ST18000NM004J Internal Hard Drive 3.5" 18TB 7.2K RPM SAS 12Gb/s for Servers *Desktop PC's Not Supported*(Renewed) (18 TB) at $366.00 ($20.33 per TB)
18 TB hard drive buying guide
Who a 18 TB drive is for
18 TB appeals when bay count is limited but you need a lot of storage, think eight-bay NAS units that must hold a decade of media.
18 TB hard drive vs SSD
HDD focus. Flash at 18 TB is not a consumer value play; budget SSDs separately for faster boot and scratch drives.
What to look for in a 18 TB drive
- Compatibility with your backplane and SATA expanders, power spikes on spin-up.
- Enterprise rescue services vs bare OEM trays.
- Noise and vibration when mixed with smaller disks in the same array.
- Transit packaging, weight per drive increases shipping risk.
How we compare 18 TB prices
18 TB price per TB may beat 16 TB or trail 20 TB depending on supply. Check neighbor stats before bulk orders.
18 TB price per TB on this page
Among 28 drives we compare on this page, price per TB runs from about $16.67 to $40.28. Checkout totals and coupons can differ.
Compare all 18 TB hard drive prices
18 TB hard drive questions
18 TB for home NAS, overkill?
Not if you are tired of adding bays. Fewer, larger drives can lower power and simplify volume management if you trust your backup plan.
18 TB rebuild stress on parity RAID?
Large disks take longer to rebuild, exposing parity arrays to second-disk failure. Have a cold spare or cloud backup before rebuilds.
Do all NAS vendors support 18 TB?
Recent models usually do after firmware updates. Verify the compatibility list for your exact NAS and OS version.
How many 18 TB drives are on this page?
We compare 29 18 TB hard drives and SSDs on this page, including nearby capacities within about 5% of 18 TB.
What do 18 TB drives cost on this page?
Among comparable storage drives on this page, prices run from about $300.00 (MDD MAXDIGITALDATA X18 MACH.2 (Dual Actuator) 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (MDD18TSAS51272E-2X18) - [Not a SATA HDD] (Renewed) (18 TB)) up to $725.00 (Seagate Exos X18 ST18000NM005J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS) - 7200rpm - 5 Year Warranty), before shipping or coupons.
What is the 18 TB price per TB on this page?
About $16.67 to $40.28 per TB across 28 drives we use for this summary.
Cheapest 18 TB HDD on this page?
MDD MAXDIGITALDATA X18 MACH.2 (Dual Actuator) 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (MDD18TSAS51272E-2X18) - [Not a SATA HDD] (Renewed) (18 TB) at $300.00 (about $16.67 per TB).