4TB HDD for CCTV: 3.5-inch SATA Surveillance Drives
5 products · prices include VAT
Pick the capacity by how many days of footage you want to keep, then check the drive is rated to run around the clock — an ordinary desktop drive is not built for that.
5 products
This range covers five 4TB hard disk drives (HDDs). All are 3.5" SATA (Serial ATA) drives, the full-size format that fits the bays in most CCTV recorders. A 4TB drive gives you four terabytes of space for video. How many days that holds depends on your camera count, resolution and recording settings.
How to choose
- Surveillance drives: The Seagate SkyHawk (5900RPM) and Toshiba S300 (5400RPM) are sold as surveillance drives. RPM means revolutions per minute, the platter speed. One Seagate listing is described as ideal for 24/7 continuous recording.
- Enterprise drive: The Lenovo 4TB is a 7.2K SATA enterprise HDD. 7.2K means 7,200 RPM. It is listed with part numbers 00XH226 and 02YH047.
- Generic 4TB listing: One listing is a plain 4TB 3.5" SATA HDD.
What else you need
- A recorder (NVR, network video recorder, or DVR, digital video recorder) with a free 3.5" SATA bay.
- Confirmation in the recorder's manual that it accepts 4TB drives.
- Enough total capacity for your retention target. Add a second drive if the recorder has a spare bay.
4TB — frequently asked questions
Are these drives 3.5-inch or 2.5-inch?
All five products in this range are 3.5" SATA hard drives, so check your recorder has a bay of that size.
What is the difference between 5400RPM and 5900RPM?
RPM is how fast the platters spin. The Toshiba S300 is listed at 5400RPM and the Seagate SkyHawk at 5900RPM.
Will a 4TB drive work in any recorder?
Not necessarily. Check the recorder's manual for its maximum supported drive size and its number of SATA bays.
Related guides
- How Much Storage Do I Need for CCTV? UK Guide 2026Each camera needs roughly its bitrate in Mbps × 10.8 GB per day of continuous recording.
- Best NVR Recorder UK 2026: Size, Storage and PoE GuideThe best NVR recorder is the one whose channel count, total bitrate ceiling and drive bays cover your cameras and your retention period with room to spare, so…