Best 18TB storage, ranked by $/TB

SSD · NVMe · hard drive · external · NAS · SAS · microSD, all on Amazon.com

United StatesCanada

Updated 19 minutes ago

As an Amazon Associate we earn from qualifying purchases. Prices and availability come from Amazon.com as of the last update and may change.

18TB drives are high-capacity territory, almost always 3.5-inch hard drives for NAS, servers and bulk archives. At this size the price per terabyte is usually at its lowest, which is why 18TB and the 14-18TB band around it are the value sweet spot for mass storage. This table ranks every 18TB drive we track on Amazon.com by live price per terabyte, so you can find the cheapest capacity per dollar.

Best price per TB

$5.50

Products tracked

Prices updated

19 minutes ago

TypeForm factorInterfaceMin capacityConditionBrand

Price per

Sort

56 products

Product	Capacity	Price	$ / TB	Tech	Prime	Buy
Quantum Tape, Lto, Ultrium-9, Mr-L9Mqn-01 18Tb/45Tb, Lto-9	18 TB	$98.99	$5.50	Tape · SAS	-	Buy on Amazon
HPE LTO-9 45TB RW Data Cartridge	18 TB	$99.99	$5.56	Tape · SAS	-	Buy on Amazon
Ibm Lto Ultrium-9 02xw568 18tb/45tb Lto-9	18 TB	$104.99	$5.83	Tape · SAS	-	Buy on Amazon
Water Panther WP Expanse 18TB 7200 RPM 512e SATA Gen3 3.5-inch HDD \| ECC PLP CMR \| Enterprise Data Center SAN Hard Disk Drive - WESA5SLC0180D (Renewed)Renewed	18 TB	$328.99	$18.28	HDD · SATA	-	Buy on Amazon
Seagate (Recertified) Exos X18 18TB Enterprise HDD - CMR 3.5 Inch Hyperscale SATA 6Gb/s, 7200 RPM, 512e and 4Kn FastFormat, Low Latency with Enhanced Caching (ST18000NM000J)Renewed	18 TB	$389.99	$21.67	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256MB Cache, 3.5" - WD180PURZUsed	18 TB	$459.99	$25.56	HDD · SATA	-	Buy on Amazon
Western Digital Internal Hard Drives 18Tb DC HC550 Surveillance,Wd 3.5 HDD Sata 6Gb/s 7200 PRM NAS 512 mb Cache for Dvr Nvr	18 TB	$469.99	$26.11	HDD · SATA	-	Buy on Amazon
HP/Western Digital Ultrastar DC HC550 WUH721818ALE600 0F38492 18TB 7200 RPM SATA 6Gb/s 512e 512MB Cache Power Disable 3.5in Enterprise Hard Drive MB018000GXLAV P37677-001 (Renewed)Renewed	18 TB	$488.00	$27.11	HDD · SATA	-	Buy on Amazon
Western Digital 18TB Elements Desktop External Hard Drive USB 3.0 for plug-and-play storage - Western DigitalBWLG0180HBK-NESNUsed	18 TB	$508.94	$28.27	HDD · USB	Prime	Buy on Amazon
Seagate IronWolf Pro 18TB NAS HDD, ST18000NE000 SATA 6Gb/s 3.5" (Renewed)Renewed	18 TB	$519.99	$28.89	HDD · SATA	-	Buy on Amazon
Western Digital DC HC550 18TB SATA 6Gb/s 7200RPM 3.5-inch Enterprise HDD - WUH721818ALE604 (0F38453) (Renewed)Renewed	18 TB	$529.00	$29.39	HDD · SATA	-	Buy on Amazon
Western Digital WD WUH721818AL5204 18TB SAS 12Gb/s 7.2K RPM 512M 0F38353 512e/4Kn SE HDD (Renewed)Renewed	18 TB	$539.00	$29.94	SAS	-	Buy on Amazon
MDD 2018 MDD18TS25672NAS 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal NAS Hard Drive - 5 Years Warranty (Renewed)Renewed	18 TB	$539.99	$30.00	HDD · SATA	-	Buy on Amazon
MDD MAXDIGITALDATA MDD (MD18TSATA25672NAS) 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal NAS Hard Drive - 5 Years Warranty (Renewed)Renewed	18 TB	$539.99	$30.00	HDD · SATA	-	Buy on Amazon
Seagate Exos ST18000NM003C 18TB 7200RPM 512e SATA 6Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (Renewed)Renewed	18 TB	$539.99	$30.00	HDD · SATA	-	Buy on Amazon
MDD MAXDIGITALDATA MDD (MDD18TS25672NAS) 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal NAS Hard Drive (Renewed)Renewed	18 TB	$539.99	$30.00	HDD · SATA	-	Buy on Amazon
Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J (Renewed)Renewed	18 TB	$540.00	$30.00	HDD · SATA	-	Buy on Amazon
MDD MAXDIGITALDATA MDD 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal NAS Hard Drive (Renewed)Renewed	18 TB	$549.99	$30.56	HDD · SATA	-	Buy on Amazon
Seagate Exos X18 ST18000NM000J 18 TB Hard Drive - Internal - SATA (SATA/600) (Renewed)Renewed	18 TB	$549.99	$30.56	HDD · SATA	-	Buy on Amazon
MDD MAXDIGITALDATA 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5inch Internal Enterprise Hard Drive - 5 Years Warranty (Renewed)Renewed	18 TB	$549.99	$30.56	HDD · SATA	-	Buy on Amazon
Seagate Exos ST18000NM002C 18TB 7200RPM 512e SATA 6Gb/s 512MB Cache 3.5-Inch Enterprise Hard Drive (Renewed)Renewed	18 TB	$559.99	$31.11	HDD · SATA	-	Buy on Amazon
Western Digital Ultrastar DC HC550 18TB 7200RPM 3.5" SATA Hard Drive WUH721818ALE6L4 (Renewed)Renewed	18 TB	$569.00	$31.61	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Red Pro NAS WD181KFGX 7200 RPM SATA 6 Gb/s CMR 256 MB Cache 3.5" Internal Hard Drive HDD (Renewed)Renewed	18 TB	$589.00	$32.72	HDD · SATA	-	Buy on Amazon
WD WD181KRYZ Gold 18 TB Hard Drive - 3.5-inch Internal - SATA (SATA/600) - Server, Storage System Device Supported - 7200rpm (Renewed)Renewed	18 TB	$599.00	$33.28	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ (Renewed)Renewed	18 TB	$599.00	$33.28	HDD · SATA	-	Buy on Amazon
Western Digital Ultrastar DC HC550 18 TB Hard Drive - 3.5 Internal - SATA	18 TB	$599.00	$33.28	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZUsed	18 TB	$599.00	$33.28	HDD · SATA	-	Buy on Amazon
Western Digital Ultrastar DC HC550 18 TB Hard Drive - 3.5 Internal - SATAUsed	18 TB	$599.99	$33.33	HDD · SATA	-	Buy on Amazon
Seagate Exos X20 18TB 7200 RPM 512e SATA 6Gb/s 3.5" Enterprise Hard Drive - ST18000NM003D (Renewed)Renewed	18 TB	$599.99	$33.33	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGXUsed	18 TB	$619.00	$34.39	HDD · SATA	-	Buy on Amazon
Western Digital WD WUH721818AL5204 18TB SAS 12Gb/s 7.2K RPM 512M 0F38353 512e/4Kn SE HDDUsed	18 TB	$650.00	$36.11	SAS	-	Buy on Amazon
Western Digital 18TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 512MB Cache, 3.5" - WD180PURZ (Renewed)Renewed	18 TB	$669.00	$37.17	HDD · SATA	-	Buy on Amazon
Seagate Exos X18 ST18000NM005J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS) - 7200rpm - 5 Year WarrantyUsed	18 TB	$677.81	$37.66	SAS	-	Buy on Amazon
Western Digital Ultrastar DC HC550 WUH721818AL5201 18 TB Hard Drive - 3.5" Internal - SAS (12Gb/s SAS) (Renewed)Renewed	18 TB	$699.00	$38.83	SAS	-	Buy on Amazon
Seagate IronWolf 18TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage, Rescue Services – Frustration Free Packaging (ST18000VNZ00)Used	18 TB	$699.99	$38.89	HDD · SATA	-	Buy on Amazon
Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J	18 TB	$712.00	$39.56	HDD · SATA	-	Buy on Amazon
Seagate Enterprise ST18000NM004J Internal Hard Drive 3.5" 18TB SAS	18 TB	$715.00	$39.72	SAS	-	Buy on Amazon
Western Digital WD WUH721818AL5204 18TB SAS 12Gb/s 7.2K RPM 512M 0F38353 512e/4Kn SE HDD	18 TB	$719.97	$40.00	SAS	-	Buy on Amazon
Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX	18 TB	$752.99	$41.83	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Purple Pro Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181PURPUsed	18 TB	$769.49	$42.75	HDD · SATA	Prime	Buy on Amazon
Western Digital 18TB Elements Desktop External Hard Drive USB 3.0 for plug-and-play storage - Western DigitalBWLG0180HBK-NESN	18 TB	$782.99	$43.50	HDD · USB	Prime	Buy on Amazon
Seagate Exos X18 ST18000NM005J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS) - 7200rpm - 5 Year Warranty	18 TB	$784.45	$43.58	SAS	-	Buy on Amazon
Seagate ST18000NM003D 18TB Exos X20 SATA Hard Drive, 3.5" HDD, SATA 6Gb/s, 7200rpm, 256MB Cache, 512E, 4.16ms, NCQ	18 TB	$792.00	$44.00	HDD · SATA	-	Buy on Amazon
WD 18TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0180HBK-NESN	18 TB	$796.92	$44.27	HDD · USB	-	Buy on Amazon
Western Digital 18TB WD Purple Pro Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181PURP	18 TB	$809.99	$45.00	HDD · SATA	Prime	Buy on Amazon
Toshiba MG09ACA18TE 18 TB Hard Drive - 3.5 Internal - SATA [SATA/600]	18 TB	$847.00	$47.06	HDD · SATA	-	Buy on Amazon
Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ	18 TB	$854.99	$47.50	HDD · SATA	-	Buy on Amazon
Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA/600)	18 TB	$859.45	$47.75	HDD · SATA	-	Buy on Amazon
Seagate IronWolf 18TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage, Rescue Services – Frustration Free Packaging (ST18000VNZ00)	18 TB	$874.45	$48.58	HDD · SATA	-	Buy on Amazon
Q2079A HPE LTO 9 - 10 Pack of Data cartridges	18 TB	$959.99	$53.33	Tape · SAS	-	Buy on Amazon
10-Pack Quantum LTO 9 MR-L9MQN-01 Ultrium Data Cartridge	18 TB	$968.99	$53.83	Tape · SAS	-	Buy on Amazon
IBM LTO Ultrium 9 -10 Pack	18 TB	$999.99	$55.56	Tape · SAS	-	Buy on Amazon
Western Digital 18TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256MB Cache, 3.5" - WD180PURZ	18 TB	$1,089.00	$60.50	HDD · SATA	-	Buy on Amazon
Western Digital WD Gold Internal Hard Drive, 18 TB, 3.5 Inches, SATA 7200 RPM, 512 MB Cache, 512 MB, Enterprise, 5 Years Manufacturer's Warranty, Eco Package (Authorized Dealer in Japan)	18 TB	$1,145.90	$63.66	HDD · SATA	Prime	Buy on Amazon
Western Digital WD Red Pro Internal Hard Drive 18 TB CMR 3.5 inch SATA 7200 RPM 512MB NAS WD181KFGX-AJP Eco Package	18 TB	$1,299.99	$72.22	HDD · SATA	-	Buy on Amazon
HPE LTO-9 45TB RW Non CUST LBL 20 CRTG	18 TB	$1,899.99	$105.56	Tape · SAS	-	Buy on Amazon

Frequently asked questions

Is a 18TB drive good value?

Often yes. High-capacity drives usually have the lowest price per terabyte, so 18TB can be excellent value for bulk storage.

What is the cheapest 18TB drive?

The table above is sorted by price per terabyte, so the best value 18TB options are at the top. Prices update daily from Amazon.com.

18TB SSD or hard drive?

18TB is almost always a hard drive; SSDs at this size are rare and expensive.

Last updated: 2026-10-31 12:02:04 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.com and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.