QNAP TS-251B-4G, 2bay, 4GB RAM, Intel Dual-core CPU, PCIe slot x1, ideal NAS (Network-attached Storage) Enclosure…

Price range: £546.11 through £904.83

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The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.
4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications.

Synology DS1019+ 5 Bay Desktop NAS Enclosure ,Black

Price range: £387.56 through £1,310.07

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A scalable 5-bay desktop NAS with outstanding performance, ideal for small offices and IT enthusiasts
Quad-core CPU with AES-NI encryption engine, delivering reading and writing throughput at over 225 MB/s even when data are encrypted

TERRAMASTER F5-422 10GbE NAS 5-Bay Network Storage Server Quad-core CPU with Hardware Encryption (Diskless)

Price range: £339.99 through £1,246.50

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POWERFUL HARDWARE: Intel Apollo Quad-core 1.5GHz CPU, 4GB of RAM (expandable up to 8GB).
1x10GbE RJ45 port, blazingly fast speed of 670MB/s reading and 650MB/s writing. Dual 1GbE LAN with failover and Link Aggregation support.

WD 56 TB My Cloud EX4100 Expert Series 4-Bay Network Attached Storage, Black

£1,669.99

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Centralised storage with anytime, anywhere access
Integrated 1.6 GHz Marvell ARMADA 388 dual-core processor and 2 GB DDR3 memory

SSK 4TB Personal Cloud, Network Attached Storage Support Auto-Backup, Home Office Storage NAS with Hard Drive Included…

£124.99

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【Your personal cloud storage with 4TB large capacity】:This NAS built-in 3.5inch 4TB storage, as long as it is powered and connected to the internet, you will be able to remote access and manage the storage data freely at anywhere by PC/Mobile phone, without geographical restrictions. Point to Point(P2P) confidential transmission to ensure the data security;
【Two working mode with LED Indicator】: Two working mode meets all of your needs. NAS(Network-attachment Storage) Mode and DAS(Direct-attached storage) Mode. With 1000M Ethernet port for NAS mode, true wireless speed can reach to 30-40MB/s. With USB3.0 High speed transmission port for DAS mode to transfer larger numbers of various sized files. Two Modes with different LED indicator colors, easy understanding;

NETGEAR ReadyNAS 424 4-bay Network Attached Storage Diskless (RN42400-100NES)

Price range: £281.09 through £3,855.50

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Five levels of high data protection: X-RAID, unlimited snapshots, bit rot protection, anti-virus and offsite replication
Four bays support up to 40 TB of storage, up to 90 TB with optional EDA500 expansion chassis and tool-less drive trays make installation a breeze

TERRAMASTER F5-221 NAS 5 bay Cloud Storage Intel Dual Core 2.0GHz Plex Media Server Network Storage (Diskless)

Price range: £239.99 through £349.99

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POWERFUL HARDWARE: Intel Apollo J3355 2.0GHz dual-core CPU, and 2GB of RAM (expandable up to 4GB). Blazingly fast speed of 200 MB/s reading and 190 MB/s writing.
AES hardware encryption engine encrypts shared folders and network data transmission to keep data from unauthorized access.

Asustor AS3102T v2-2 Bay NAS, Dual Core 1.6GHz CPU, GbE Port, 2GB RAM DDR3, Network Attached Storage, Personal Private…

£225.00

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TIER – Entry-level home / personal 2-bay NAS for storage and multimedia with 1.6GHz Dual-Core processor and 2GB DDR3 RAM. This NAS packs a power performance with up to 112MB/s read and 112MB/s write speed.
FEATURES – Asustor Backup Plan allows you to automatically schedule a backup of your data from any PC or MAC to your NAS. Asustor EZ-Connect allows you to connect to your NAS remotely from any computer or mobile phone. Asustor EZ-Sync turns your NAS into a real-time file syncing personal cloud space with file versioning.

WD My Cloud EX4100, 16 TB (4 x 4 TB) 4-Bay Pre-configured 16 TB NAS with WD Red drives

Price range: £325.51 through £1,193.91

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Faster speed, better streaming: Powerful marvell ARMADA 388 1.6 GHs dual-core processor and 2 GB DDR3 memory for ultra-fast transfer speeds of 114 MB/s upload and 108 MB/s download for media streaming
Access from anywhere: Save, access and stream your content anywhere you have an Internet connection with the My Cloud mobile app