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WD Blue SA510 250GB SSD vs SanDisk 320 SATA SSD 500GB

The WD Blue SA510 is the better-documented drive and the safer pick for a 2.5-inch SATA upgrade. It has a published write speed, endurance rating and bundled backup software, and it holds a large body of owner feedback. The SanDisk 320 doubles the capacity and scores higher, but on far fewer ratings and with little published detail. If you need room for a big game or media library, the SanDisk wins on space; if you want proven reliability and support, take the WD.

  • Choose the WD Blue SA510 if you want a proven boot drive with published endurance, backup software and a long track record of owner reviews.
  • Choose the SanDisk 320 if you need twice the storage for games, photos or video and are comfortable with a newer, less-reviewed drive.

Prices

  • WD Blue SA510 250GB SSD: $52.88 at BlueDogInk (last seen Nov 2)
  • SanDisk 320 SATA SSD 500GB: $94.99 at B&H Photo-Video-Audio (last seen Nov 6)
  • Difference: the WD Blue SA510 250GB SSD is $42.11 cheaper than the SanDisk 320 SATA SSD 500GB at the latest prices (Nov 2 and Nov 6)
Western Digital
Western Digital WD Blue SA510 SATA 2.5" SSD 250GB

WD Blue SA510 250GB SSD

Western Digital WD Blue SA510 SATA 2.5" SSD 250GB

4.6(1,135 ratings)
$52.88at BlueDogInkObserved Nov 2, 2026, 4:44 PM
See all prices and details
Visit BlueDogInk
Pros
  • Published 560MB/s read and 520MB/s write
  • 100 TBW endurance rating gives a clear lifespan figure
  • Backup and cyber protection software included
  • Slim 7mm height fits most laptops
  • Large base of owner ratings
Cons
  • Only 250GB, tight for games and large media
  • SATA only, no NVMe or PCIe support
  • No hardware encryption
SanDisk
SanDisk 320 SATA SSD

SanDisk 320 SATA SSD 500GB

SanDisk 320 SATA SSD

4.9(41 ratings)
$94.99at B&H Photo-Video-AudioObserved Nov 6, 2026, 1:37 PM
See all prices and details
Visit B&H Photo-Video-Audio
Pros
  • 500GB gives twice the room of the WD
  • 545MB/s read is close to the WD
  • High rating score from early buyers
  • Standard 2.5-inch SATA fit
Cons
  • Write speed and endurance not published
  • Very few ratings so far
  • No bundled migration or backup software listed

What separates them

WD Blue SA510 250GB SSDSanDisk 320 SATA SSD 500GB
Capacity250GB500GB
Sequential read560MB/s545MB/s
Sequential write520MB/s publishedNot published
Endurance rating100 TBW publishedNot published
Bundled softwareAcronis True Image for Western Digital plus a Dropbox Professional trialNone listed
Owner feedback4.6 from 1,135 ratings4.9 from 41 ratings
Interface and form factorSATA 2.5-inch, 7mm slimSATA 2.5-inch
Power drawAbout 1.8W read, 2.0W writeNot published

Price history

$101.18$52.88
Nov 2Nov 8
  • WD Blue SA510 250GB SSD: lowest $52.88 on Nov 2 at BlueDogInk; $101.18 on Nov 8.
  • SanDisk 320 SATA SSD 500GB: lowest $94.99 on Nov 6 at B&H Photo-Video-Audio.

Prices at every store

WD Blue SA510 250GB SSD

  • NeweggNew

    In stock

    $101.18Free shippingObserved Nov 8, 2026, 3:52 PM
    Visit Newegg
  • BlueDogInkNew

    Availability unknown

    $52.88Observed Nov 2, 2026, 4:44 PM
    Visit BlueDogInk
  • eBayNew

    Availability unknownSold by focus*part (99.4% positive, 37,600 ratings)Ships from China · duties may applyReturns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $57.83Free shippingObserved Nov 8, 2026, 3:52 PM
    Visit eBay
  • DihuniNew

    Availability unknown

    $1,611.00Observed Nov 2, 2026, 4:44 PM
    Visit Dihuni

Also available at

  • eBayCheck price at eBay

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All 7 stores and price history →

SanDisk 320 SATA SSD 500GB

  • B&H Photo-Video-AudioNew

    Availability unknown

    $94.99Observed Nov 6, 2026, 1:37 PM
    Visit B&H Photo-Video-Audio
  • SilariusNew

    Availability unknown

    $151.99Observed Nov 6, 2026, 1:37 PM
    Visit Silarius
  • eBayNew

    Availability unknownSold by nothingbutsavings (99.5% positive, 136,200 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $439.32Free shippingObserved at 9:40 AM
    Visit eBay

Store links may earn us a commission.

All 3 stores and price history →

Specs compared

SpecWD Blue SA510 250GB SSDSanDisk 320 SATA SSD 500GB
TypeSSD, Solid State DriveInternal
Read Speed560MB/s545 MB/s
Form Factor2.5"2.5 Inch Drive
UseInternal—
Device CompatibilityPC—
InterfaceSATA—
Wireless ConnectivityNo—
DurabilityHigh endurance, Reduced vibrations compared to …—
Write Speed520 megabytes per second—
NVMe SupportNo—
PCIe SupportNo—
CacheNav datu—
Show all 40 specsShow fewer specs
SpecWD Blue SA510 250GB SSDSanDisk 320 SATA SSD 500GB
Data EncryptionNo (hardware encryption)—
Security HighlightsCyber protection software—
Design HighlightsSlim—
Typical UsersProfessionals—
Power Sourcedc—
Power ConsumptionLow power draw—
RemovableNo—
Wi-FiNo—
Power Consumption (read) (W)1.8—
TBW (terabytes written) (TB)

What reviewers say

WD Blue SA510 250GB SSD

  • 4.6 / 51,135 ratings

Owners of the WD Blue SA510 line generally report a clear speed-up over the hard drive it replaced and stable day-to-day performance. Some criticise the small capacities for wearing out or filling quickly, and a few report drives failing earlier than expected.

What people mention
  • SpeedPraisedOwners say boot times and app launches drop sharply compared with the hard drive it replaces.
  • CapacityCriticisedBuyers of the 250GB model say it fills quickly and leaves little room for games or media.
  • ReliabilityMixedMany drives run for years, but some owners report early failures and warranty claims.
  • InstallPraisedThe standard 2.5-inch SATA shape makes swapping it into a laptop or desktop straightforward.

SanDisk 320 SATA SSD 500GB

  • 4.9 / 541 ratings

Buyers rate it 4.9 out of 5 across 41 ratings, with most describing it as a fast, trouble-free upgrade. Complaints are few and mostly about capacity rather than reliability.

What people mention
  • SpeedPraisedOwners say boot times and app loads drop sharply compared with the hard drive it replaces.
  • SetupPraisedBuyers report it works as a plain plug-in drive with no drivers or software needed.
  • ReliabilityPraisedLong-term owners say it has kept working in daily use.
  • CapacityCriticisedSome buyers find 500 GB fills up quickly once games and media are installed.

Questions and answers

Which is better for a laptop boot drive?
The WD Blue SA510. Its 7mm slim body, published power draw and included cloning software make the swap simpler, and 250GB is enough for the OS and core apps. Pick the SanDisk 320 if you keep many large files on the same laptop.
Which holds more games and media?
The SanDisk 320, at 500GB against 250GB. Modern games often run past 100GB each, so the extra room matters more than the small read-speed gap.
Which lasts longer?
The WD Blue SA510 is the only one with a published endurance figure, 100 TBW. SanDisk does not list a TBW for the 320, so its lifespan is harder to judge before purchase.
Is the SanDisk 320 worth stepping up to?
Yes if capacity is your limit. You get double the storage and similar read speed. You give up a published write speed, an endurance rating and bundled backup software.
Do both work in the same desktop or laptop?
Yes. Both are 2.5-inch SATA drives, so either fits any standard SATA bay or caddy. Neither uses NVMe or PCIe, so check that your machine has a free SATA port.
Which is faster in real use?
They are close. The WD lists 560MB/s read and 520MB/s write; the SanDisk lists 545MB/s read. The difference is small next to the capacity gap, so choose on space and support rather than speed.

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100
—
Depth (")3.945—
Width (")2.752—
Power Consumption (write) (W)2.0—
Weight (oz)1.22—
PlacementInternal—
Size (GB)250—
Height (")0.276—
Flash Memory3D TLC—
Random Write 4KB (max) (IOPS)78000—
Sequential Write (MB/s)440—
Sequential Read (MB/s)555—
MTBF (mean time between failures) (h)1750000—
Random Read 4KB (max) (IOPS)80000—
Hard Drive Capacity250—
colorMultiColor—
size1—
Connection—SATA
Capacity—500 GB