Verdict

These are closely matched SSDs of the same capacity - decide on price and warranty. Check the live $/TB above.

CT4000T705SSD3
Crucial T705 · 4TB · Desktop
£759 (£189.75/TB)
MZ-V9S4T0BW
Samsung 990 EVO Plus · 4TB · Desktop
No UK price yet

Value at a glance

Price / TB
CT4000T705SSD3 $157.50
MZ-V9S4T0BW $187.00
Endurance (TBW)
CT4000T705SSD3 2,400 TB
MZ-V9S4T0BW 2,400 TB

Price history

UK · cheapest per day

CT4000T705SSD3 £759 MZ-V9S4T0BW £549
zoomed · drag to zoom
£899 £584 £268 Nov 2024 Mar 2025 Aug 2025 Jan 2026 Jun 2026 Nov 2026
CT4000T705SSD3 MZ-V9S4T0BW
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 2,400 TB 2,400 TB
DWPD - -
DRAM cache Yes No
Power-loss protection No No
Sustained write - -
Cost / TBW $0.262 $0.312
Price / TB $157.50 $187.00
Buy
£759
View at Amazon →
No UK price yet

Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.

CT4000T705SSD3

No Backblaze failure data for this model.

MZ-V9S4T0BW

No Backblaze failure data for this model.