TerabyteWise
Updated · Specifications verified October 12, 2026

Work Out How Long an SSD's Rating Lasts

17 drives with a datasheet TBW rating built in

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Quick answer

Divide the drive's rated terabytes written by what you write in a year. A 1TB WD Red SN700, rated at 2,000 TBW, written at 100GB a day takes 54.8 years to reach its rating; at 1TB a day it takes 5.5. The calculator does that for 17 drives with a datasheet rating, or for any figure you type in.

As of October 12, 2026
Best price per TB
$110.00
In-stock listings in the tables on this page
40
Prices updated
3 hours ago

Years to reach the rating, at four write rates

DriveRated endurance50GB a day100GB a day500GB a day1TB a day
WD Red SN700 250GB500 TBW27.413.72.71.4
WD Red SN700 500GB1,000 TBW54.827.45.52.7
WD Red SN700 1TB2,000 TBW100+54.811.05.5
WD Red SN700 2TB2,500 TBW100+68.513.76.8
WD Red SN700 4TB5,100 TBW100+100+27.914.0
WD Red SA500 500GB350 TBW19.29.61.91.0
WD Red SA500 1TB600 TBW32.916.43.31.6
WD Red SA500 2TB1,300 TBW71.235.67.13.6
WD Red SA500 4TB2,500 TBW100+68.513.76.8

What the result means

The rating is a warranty limit. WD's warranty on both WD Red SSD lines is five years; on the SN700 it is five years or the TBW limit, whichever comes first. So a result under five years means a cache that can outrun its warranty, and a result over five means the calendar ends the warranty first.

Your write rate is the hard part. A storage volume is written when you save files. A read-write cache is written every time the NAS decides something is worth caching, which can be many times the data you actually change. Read the drive's written total from the NAS after a typical week and multiply up.

The figures behind the presets

Endurance by model number, with the makers' sheets.

Best NVMe for a NAS cache · Best SATA SSD for a NAS

Where the figures come from

Western Digital's WD Red product briefs and Synology's SNV product specifications, read on October 12, 2026. Each figure is the one printed beside the model number. Other makers' cache drives are not in the table because their endurance figures have not been read into this site's record.

Checked on October 12, 2026. Sources: Western Digital: WD Red SN700 NVMe SSD product brief; Western Digital: WD Red SA500 NAS SATA SSD product brief; Synology SNV5420 product specifications (400G, 800G and 1600G sheets).

Written a year
36.5 TB
Years to reach the rating
13.7
Rating used within the warranty
37%

TBW is the amount of data the maker warrants the drive for, not the point at which it stops working. A cache drive in a busy NAS can be written far more than the same drive used for storage, so measure your own daily writes before relying on the figure.

M.2 2280 NVMe drives, by price per TB

Price per
40 products
ProductCapacityPrice$ / TBTypePrimeBuy
2TB AData Legend 710 PCIe Gen3 x4 M.2 2280 SSD Solid State Disk2 TB$219.99$110.00M.2 NVMe-Buy on Amazon
KingSpec 2TB M.2 NVMe Gen3 SSD 2280, 3500MB/s Read Speed, for Laptop PC2 TB$239.97$119.99M.2 NVMe-Buy on Amazon
Acer FA200 NVMe Gen4 SSD 4TB, PCIe 4.0, M.2 2280, Read Speeds Up to 7200MB/s, Internal Solid State Drive for Laptop, Desktop PC and PS5 Upgrade - BL.9BWWA.1504 TB$479.99$120.00M.2 NVMe-Buy on Amazon
Bestoss 2TB NVMe M.2 SSD PCIe 3.0 M.2 2280 Internal SSD, Up to 2400MB/s2 TB$244.99$122.50M.2 NVMe-Buy on Amazon
KingSpec 2TB M.2 SSD 2280 NVMe PCIe 4.0 x4, Read/Write Speed up to 4000/3500MB/s, Internal M2 PCIe SSD Compatible with Gaming Console/Desktop/Gaming Laptop2 TB$245.99$123.00M.2 NVMe-Buy on Amazon
Western Digital 2TB WD Green SN350 NVMe Internal SSD Solid State Drive - Gen3 PCIe, QLC, M.2 2280, Up to 3,200 MB/s - WDS200T3G0C2 TB$246.00$123.00M.2 NVMe-Buy on Amazon
TEAMGROUP MP44Q 4TB SLC Cache Gen 4x4 M.2 2280 PCIe 4.0 w/NVMe Laptop Desktop NUC NAS SSD Read/Write Speed up to 7000/5900MB/s TM8FFD004T0C1014 TB$492.99$123.25M.2 NVMe-Buy on Amazon
KingSpec NX Series 2TB Gen3x4 NVMe M.2 SSD, Up to 3500MB/s, 3D NAND Flash M2 2280 Internal Solid State Drive, for Desktop and Laptop2 TB$246.99$123.50M.2 NVMe-Buy on Amazon
TEAMGROUP MP33PRO 2TB SLC Cache 3D NAND TLC NVMe 1.3 PCIe Gen3x4 M.2 2280 Internal SSD R/W Speed Up to 3500/3000 MB/s Laptop & Desktop TM8FPD002T0C1012 TB$249.00$124.50M.2 NVMe-Buy on Amazon
ADATA Legend 860, PCIe Gen4 Solid State Drive, 2TB, 1 Count2 TB$249.98$124.99M.2 NVMe-Buy on Amazon
Crucial E100 2TB M.2 NVMe PCIe Gen4 Internal SSD, Up to 5,000MB/s, Laptop & Desktop Compatible - CT2000E100SSD82 TB$249.98$124.99M.2 NVMe-Buy on Amazon
TEAMGROUP MP33 2TB SLC Cache 3D NAND TLC NVMe 1.3 PCIe Gen3x4 M.2 2280 Internal Solid State Drive SSD (Read/Write Speed up to 1,800/1,500 MB/s) Compatible with Laptop & PC Desktop TM8FP6002T0C1012 TB$249.99$125.00M.2 NVMe-Buy on Amazon
Ediloca 2TB NVMe M.2 SSD PCIe Gen 3x4, Up to 2150MB/s Read, M.2 2280 Internal Solid State Drive, Dynamic SLC Cache, Compatible with PC, Desktop and Laptops(EN680E)2 TB$249.99$125.00M.2 NVMe-Buy on Amazon
XPG SX8100 4TB 3D NAND NVMe Gen3x4 PCIe M.2 2280 Solid State Drive R/W 3500/3000MB/s SSD (ASX8100NP-4TT-C)4 TB$499.99$125.00M.2 NVMe-Buy on Amazon
Crucial P310 2TB SSD, PCIe Gen4 NVMe M.2 2280, Up to 7,100MB/s, for Laptop, Desktop (PC), & Handheld Gaming Consoles, Includes Acronis Data Recovery Software, Solid State Drive - CT2000P310SSD801Sold by Amazon2 TB$252.74$126.37M.2 NVMePrimeBuy on Amazon
Patriot P300 M.2 PCIe Gen 3 x4 2TB Low-Power Consumption SSD2 TB$254.99$127.50M.2 NVMe-Buy on Amazon
Silicon Power 2TB NVMe M.2 PCIe Gen3x4 2280 SSD Solid State Drive (SP002TBP34A60M28)2 TB$257.49$128.75M.2 NVMe-Buy on Amazon
Bestoss 4TB M.2 SSD NVMe PCIe4.0 2280 Internal Hard Drive, Up to 5000 MB/s4 TB$515.99$129.00M.2 NVMe-Buy on Amazon
KingSpec 2TB M.2 SSD 2280 NVMe PCIe 4.0 x4, Incredible Read up to 5000MB/s, Internal M2 PCIe SSD Compatible with Gaming Console/Desktop/Gaming Laptop2 TB$259.97$129.99M.2 NVMe-Buy on Amazon
BIWIN M350 NVMe Gen4 SSD 2TB, PCIe 4.0, M.2 2280, Read Speeds Up to 6000MB/s, Internal Solid State Drive for Laptop and Desktop PC - BM350NN02TB-RGX2 TB$259.99$130.00M.2 NVMe-Buy on Amazon
WD Green SN350 2TB NVMe SSD, M.2 2280 PCIe Gen3 x4, M-Key (OEM New)2 TB$259.99$130.00M.2 NVMe-Buy on Amazon
DATO Gen4 SSD with Heatsink 2TB NVMe PCIe 4.0 M.2 2280 Up to 7200/6850MB/s High Performance SSD for Gaming Creation – Ares Dark Sword Lite2 TB$259.99$130.00M.2 NVMe-Buy on Amazon
Fikwot FN950 4TB NVMe SSD PCIe Gen4x4 M.2 2280,Read Up to 5000MB/s, Configure SLC Cache, Internal Solid State Drive for PS5 Laptop Desktop4 TB$519.99$130.00M.2 NVMe-Buy on Amazon
fanxiang S660 PCIe 4.0 4TB NVMe M.2 SSD for PS5 with Heatsink, Up to 5000MB/s, Internal Gaming SSD NAND SLC Cache Suitable for PS5 Enthusiasts, Technology Enthusiasts, IT Professionals4 TB$529.99$132.50M.2 NVMe-Buy on Amazon
fanxiang 2TB NVMe SSD PCIe Gen4 M.2 SSD for PS5, Up to 5000 MB/s, Internal Gaming 3D NAND SLC Cache Solid State Drive Upgrade Storage for PC/Laptops S690Q2 TB$268.19$134.10M.2 NVMe-Buy on Amazon
ADATA 2TB Legend 860 PCIe Gen4 x4 M.2 2280 SSD Solid State Disk2 TB$269.99$135.00M.2 NVMe-Buy on Amazon
Fikwot FX991 M.2 SSD 4TB NVMe SSD M2 2280 PCIe Gen 4x4, Read Up to 7000MB/s, Internal Solid State Drive for PS5 Laptop Desktop4 TB$539.98$135.00M.2 NVMe-Buy on Amazon
Kingston NV3 4TB M.2 2280 NVMe SSD | PCIe 4.0 Gen 4x4 | Up to 6000 MB/s | SNV3S/4000G4 TB$549.00$137.25M.2 NVMe-Buy on Amazon
Silicon Power 4TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,500 MB/s (SP04KGBP44UD9005)4 TB$549.97$137.49M.2 NVMe-Buy on Amazon
SUNEAST 2TB SSD M.2 2280 PCIe Gen4.0 NVMe TLC SSD, Up to 7450MB/s Read2 TB$274.99$137.50M.2 NVMe-Buy on Amazon
fanxiang 4TB NVMe SSD PCIe Gen 4 Gaming SSD for PS5, Up to 7000MB/s M.2 2280 SSD Compatible with PS5 Storage Expansion, Internal Solid State Drive for Gamers, Professionals, Creators S880E4 TB$549.99$137.50M.2 NVMe-Buy on Amazon
KLEVV CRAS C910 2TB M.2 2280 NVMe PCIe Gen4x4 Laptop & Desktop Internal SSD Heatsink Included, up to 5200MB/s (K02TBM2SP0-C91)2 TB$276.99$138.50M.2 NVMe-Buy on Amazon
Bestoss M.2 2280 NVMe Internal SSD 4TB Gen4, Up to 7350MB/s, TLC for PS5/PC4 TB$554.99$138.75M.2 NVMe-Buy on Amazon
Acclamator 1TB SSD NVMe M.2 2280 PCIe Gen3x4 Internal Solid State Drive, Read Up to 2500MB/s with 3D NAND Flash Compatible with Laptop & PC Desktop N201 TB$138.99$138.99M.2 NVMe-Buy on Amazon
KOOTION 1TB NVMe Internal SSD PCIe 3.0, M.2 2280 NVMe Gen 3 Internal Solid State Drive Up to 3500MB/s, Less Heat for PC/Laptop1 TB$139.49$139.49M.2 NVMe-Buy on Amazon
Crucial P310 2280 4TB PCIe Gen4 NVMe Gaming PS5 SSD with Heatsink, Up to 7,100MB/s, PlayStation5, Laptop & Desktop (PC) Compatible, Solid State Drive – CT4000P310SSD5-014 TB$558.00$139.50M.2 NVMe-Buy on Amazon
Ediloca 1TB NVMe M.2 SSD PCIe Gen 3x4, Up to 2150MB/s Read, M.2 2280 Internal Solid State Drive, Dynamic SLC Cache, Compatible with PC, Desktop and Laptops(EN680E)1 TB$139.99$139.99M.2 NVMe-Buy on Amazon
Silicon Power 2TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD R/W up to 5,000/4,800 MB/s (SP02KGBP44UD9005)2 TB$279.97$139.99M.2 NVMe-Buy on Amazon
fanxiang S500 Pro 2TB NVMe SSD M.2 PCIe Gen3x4 2280 Internal Solid State Drive, SLC Cache 3D NAND TLC, Up to 3500MB/s, Compatible with Laptop and PC Desktops(Black)2 TB$279.99$140.00M.2 NVMe-Buy on Amazon
PNY CS2241 2TB PCIe Gen4 x4 NVMe M.2 2280 Internal SSD Complete Upgrade Kit2 TB$282.99$141.50M.2 NVMe-Buy on Amazon

Renewed, refurbished and used listings

Shown for reference. These are not counted in the best price per TB above, and warranty terms differ from new drives.

Price per
12 products
ProductCapacityPrice$ / TBTypePrimeBuy
Corsair MP600 CORE XT 2TB M.2 PCIe Gen4 NVMe SSD – Up to 5900MB/s – QLC NAND – M.2 2280 – for PCIe 4.0 Notebooks and Desktops – BlackUsed2 TB$204.50$102.25M.2 NVMe-Buy on Amazon
Corsair MP600 CORE XT 2TB M.2 PCIe Gen4 NVMe SSD – Up to 5900MB/s – QLC NAND – M.2 2280 – for PCIe 4.0 Notebooks and Desktops – Black (Renewed)Renewed2 TB$208.50$104.25M.2 NVMe-Buy on Amazon
Kingston NV3 4TB M.2 2280 NVMe SSD | PCIe 4.0 Gen 4x4 | Up to 6000 MB/s | SNV3S/4000GUsed4 TB$478.95$119.74M.2 NVMe-Buy on Amazon
CORSAIR MP600 PRO 4TB Gen4 PCIe x4 NVMe M.2 SSD – High-Density TLC NAND – Aluminum Heatspreader – M.2 2280 Form-Factor (Renewed)Renewed4 TB$489.60$122.40M.2 NVMe-Buy on Amazon
Corsair MP600 CORE XT 4TB PCIe Gen4 x4 NVMe M.2 SSD – High-Density QLC NAND – M.2 2280 – DirectStorage Compatible - Up to 5,000MB/sec – Great for PCIe 4.0 Notebooks and Desktops – BlackUsed4 TB$499.99$125.00M.2 NVMe-Buy on Amazon
Western Digital 1TB WD Green SN350 NVMe Internal SSD Solid State Drive - Gen3 PCIe, QLC, M.2 2280, Up to 3,200 MB/s - WDS100T3G0CUsed1 TB$127.96$127.96M.2 NVMe-Buy on Amazon
TEAMGROUP MP33 1TB SLC Cache 3D NAND TLC NVMe 1.3 PCIe Gen3x4 M.2 2280 Internal SSD R/W Speed up to 1800/1500 MB/s Laptop & PC Desktop TM8FP6001T0C101Used1 TB$129.00$129.00M.2 NVMe-Buy on Amazon
Corsair MP600 Elite 4TB M.2 PCIe Gen4 x4 NVMe SSD with Included Heatsink – M.2 2280 – Up to 7,000MB/sec Sequential Read – High-Density 3D TLC NAND – BlackUsed4 TB$519.99$130.00M.2 NVMe-Buy on Amazon
Ediloca SSD 2TB NVMe PCIe 5.0x4, Up to 14,000MB/s Read, 10,000MB/s Write, 2TB SSD with 2GB LPDDR4 DRAM & Dynamic SLC Cache, M.2 2280 3D TLC for Gaming/Video Editing/PC/Laptop (EN1400 Pro)UsedSold by Amazon2 TB$263.19$131.60M.2 NVMePrimeBuy on Amazon
Kingston NV3 2TB M.2 2280 NVMe SSD | PCIe 4.0 Gen 4x4 | Up to 6000 MB/s | SNV3S/2000GUsed2 TB$270.00$135.00M.2 NVMe-Buy on Amazon
Crucial P310 M.2 2280 2TB PCI-Express 4.0 x4 NVMe 3D NAND Internal Solid State Drive (SSD) CT2000P310SSD8Used2 TB$275.00$137.50M.2 NVMe-Buy on Amazon
msi SPATIUM M470 PCIe 4.0 NVMe M.2 1TB Internal SSD PCIe Gen4 NVMe 1.3 3D NAND 3300 TBW (SPATIUM M470 PCIe 4.0 NVMe M.2 1TB)Used1 TB$139.99$139.99M.2 NVMe-Buy on Amazon

Frequently asked questions

How long does a 1TB WD Red SN700 last at 100GB a day?

54.8 years to reach its 2,000 TBW rating, by this arithmetic. The warranty ends at five years regardless.

What does TBW mean?

Terabytes written: the amount of data the maker warrants the drive for. WD calculates it on a standard client workload and notes that it varies by capacity.

Independent US storage-value site: NAS drives, DIY/TrueNAS build parts, and hard-drive shucking, ranked by live $/TB. Not affiliated with or endorsed by Synology, UGREEN, QNAP, TerraMaster, Seagate, Western Digital or Toshiba. All trademarks belong to their owners.

Last updated: 2026-10-12 18:03:49 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.com and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.