Best Hard Drives for CCTV & Surveillance
CCTV and surveillance systems write continuously, often across multiple camera streams simultaneously. This demands drives built for 24/7 sequential write workloads, low heat output, and long retention at the lowest cost per terabyte. Consumer desktop drives are not designed for this duty cycle and will fail prematurely under sustained recording loads.
What makes a surveillance drive different
Surveillance-rated drives (like WD Purple and Seagate SkyHawk) are firmware-tuned for sequential writes from multiple video streams, with AllFrame or similar technology to reduce dropped frames. They run cooler under sustained write loads and are rated for higher annual workloads than desktop drives. For systems with fewer cameras, enterprise or NAS drives also work well — the key is 24/7 rating and adequate write endurance.
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Surveillance-Rated Drives
Purpose-built surveillance drives from WD Purple and Seagate SkyHawk lines, designed for always-on DVR and NVR recording workloads.
WD Purple SATA - Festplatte - Serial ATA (WD34PURZ)
Seagate Skyhawk AI 32TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 512MB Cache for DVR NVR Security Camera System with in-House Rescue Services (ST32000VE000)
Seagate Skyhawk AI 20TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 512MB Cache for DVR NVR Security Camera System with in-House Rescue Services (ST20000VE003)
WD Purple Pro 26TB Smart Video 3.5" Internal Hard Drive, AllFrame AI Technology, 7200 RPM, SATA 6 GB/s, 550TB/yr, 512MB Cache
Western Digital 12TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD121PURZ
WD Purple Pro 22TB Smart Video 3.5" Internal Hard Drive, AllFrame Technology, 550TB/yr, 512MB Cache, 7200 RPM, 5 Year Warranty
WD Purple Pro 24TB Smart Video 3.5" Internal Hard Drive, AllFrame AI Technology, 7200 RPM, SATA 6 GB/s, 550TB/yr, 512MB Cache
WD Purple Pro 18TB Smart Video 3.5" Internal Hard Drive, AllFrame Technology, 550TB/yr, 512MB Cache, 7200 RPM, 5 Year Warranty
High-Capacity Retention Drives (8 TB+)
More capacity means longer recording retention before overwriting. Essential for systems with many cameras or compliance requirements that mandate extended footage storage.
Seagate Exos 7E8 HDD 512E/4KN SAS
WD Purple SATA - Festplatte - Serial ATA (WD34PURZ)
Seagate Exos X14 ST10000NM0478 - Hard drive - 10 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 256 MB
Seagate Skyhawk AI 32TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 512MB Cache for DVR NVR Security Camera System with in-House Rescue Services (ST32000VE000)
HGST Ultrastar DC HC320 HUS728T8TAL5204 8 TB Hard Drive - 3.5 Internal - SAS [12Gb/s SAS]
Seagate Skyhawk AI 20TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 512MB Cache for DVR NVR Security Camera System with in-House Rescue Services (ST20000VE003)
Seagate Exos X10 Enterprise Hard Drive ST10000NM0096 10 TB - SAS 12Gb/s
WD Purple Pro 26TB Smart Video 3.5" Internal Hard Drive, AllFrame AI Technology, 7200 RPM, SATA 6 GB/s, 550TB/yr, 512MB Cache
Enterprise Drives for Large CCTV Installations
For commercial installations with dozens of cameras, enterprise drives offer higher workload ratings (550 TB/year), longer warranties, and better sustained write performance than consumer surveillance lines.
Why this matters: Enterprise drives like Exos and Ultrastar handle heavier write workloads than consumer surveillance drives (typically rated at 180 TB/year). For installations with 32+ cameras recording at high resolution, enterprise-grade endurance is worth the premium.
Seagate Exos 7E8 HDD 512E/4KN SAS
Seagate Exos X14 ST10000NM0478 - Hard drive - 10 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 256 MB
HGST Ultrastar DC HC320 HUS728T8TAL5204 8 TB Hard Drive - 3.5 Internal - SAS [12Gb/s SAS]
Seagate Exos X10 Enterprise Hard Drive ST10000NM0096 10 TB - SAS 12Gb/s
Seagate Exos 7E10 8TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST8000NM017B)
Seagate Exos X24 24TB internal server Hard drive ST24000NM000C 3.5" HDD SATA3 512MB 7200RPM
Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
Seagate Exos X24 3.5" Internal Hard Drive - 20TB, Single, SATA III 6 Gb/s
Budget CCTV Storage
Affordable drives for smaller camera setups and home security. These deliver the best price per TB for basic recording needs.
Seagate IronWolf ST4000VN008 4TB Internal Hard Drive, NAS HDD, 3.5 Inch, 5900 rpm, CMR, 64 MB Cache, SATA 6 GB/s, Silver, 3 Years Data Rescue Service
Dell 4TB Hard Drive 7.2K SAS
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (14.0, TB)
WD 2TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - WDBU6Y0020BBK-WESN
MDD 10TB 7200RPM 256MB Cache SAS 12.0Gb/s 3.5inch Internal Enterprise Hard Drive (MDD10TSAS25672E) - [NOT A SATA HDD]
ADATA HD330 1TB USB3.1 External Hard Disk, black HD330
Dell 202V7 4tb 3.5in 7.2k NL SAS 6gbs Hard Drive
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