Toshiba 6TB S300 Pro Surveillance 3.5″ SATA Internal Hard Drive. 24/7 Operation, Supports 64 cameras, 256MB Cache, 180TB/Year workload,CMR,3yr Warranty (HDWT360UZSVA).

Price range: £59.07 through £229.99

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3.5 Inch SATA Hard Drive
7201 / 5400 rpm

QNAP TS-431P 16TB 4 Bay NAS Solution | Installed with 4 x 4TB Western Digital Red Drives (GDPR Compliant)

Price range: £249.99 through £1,896.19

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Centralizes file storage, sharing and backup with excellent performance
Full NAS encryption using volume-based technology and hardware acceleration

Synology DS218play 2 Bay Desktop NAS Enclosure

Price range: £215.47 through £999.99

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2-bay NAS with optimal multimedia solution for home users
4K video transcoding on the fly with 10 bit H.265 codec support

Synology DS220+ 2 Bay NAS Enclosure,Black,2GB

Price range: £289.98 through £963.89

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2-core 2.0 GHz Processor, burst up to 2.9 GHz and boosts photo indexing, database response times, and web PHP response efficiency – average 15% boost to computing-intensive applications
Access multimedia content anytime, anywhere through an intuitive web-based interface