Prime Big Deal Days SSD Deals, Measured
Live prices updated · 128 in-stock products · tracked since July 8, 2026
12 days away - October 6 through October 8. New deals drop three times a day once it starts: 12:01 a.m. PT, 8 a.m. PT, 1 p.m. PT.
Consumer M.2 SSDs are the biggest category of the event and the one most padded by raised list prices. Today 19 of 128 in-stock items sit at or near their own recorded low today. Watch one thing SanDisk created this year: WD Black and Blue drives now also sell as SanDisk Optimus, and the same drive can carry two prices. Search both names.
We measure every price against that item's OWN recorded history, not against a list price - list prices get raised before a sale, which is documented and cited on this site's event pages. A verdict badge means: AT/NEAR LOW is close to the lowest we have tracked for that item in a record where its price has actually moved (a price that has not moved is not a low, and reads TYPICAL); TYPICAL is ordinary for it; ELEVATED is above where it usually sits; NEW means we have not tracked it long enough to say. No percentage-off-list figure appears anywhere on this site as a measure of whether a price is actually good.
The evidence for why we do it this way is our own: the June 2026 Prime Day retrospective measured whether the last comparable event moved prices, category by category, before any of these pages were written.
Live consumer ssd picks, verdict-badged
Today's verdict distribution: 19 of 128 in-stock items are at or near their own recorded low today; 91 are typical for themselves; 15 are elevated above their own usual price, and 3 have too short a record to judge yet. Each count compares an item with its own recorded price; no past price is printed for any listing.
Same drive, two names: the gap we measure today
No matched pair today. We do not currently hold the same family, capacity and heatsink state under both names at once, new against new, so there is no same-drive gap to measure. What we hold: WD Blue SN5100 at 2TB; no SanDisk Optimus 5100. WD_Black SN7100 at 2/4TB; no SanDisk Optimus GX 7100. WD_Black SN8100 at 1/2/4TB; SanDisk Optimus GX PRO 8100 at 8TB.
Reported, not measured: Tom's Hardware found the Optimus GX Pro 8100 4TB at $1799.99 and the WD Black SN8100 4TB at $1289.99, both on SanDisk's own store - the new name 40% dearer for what Tom's Hardware calls the same hardware. The rename itself is SanDisk's: Optimus was previously WD Blue (SN5100), Optimus GX was previously WD_BLACK (SN7100), Optimus GX PRO was previously WD_BLACK (SN8100).
Source: Sandisk press release, “Sandisk unveils SANDISK Optimus™ SSD Product Brand”, published 2026-01-05, read at source 2026-09-24. Reported, not measured by us.
Source: Tom's Hardware, Zhiye Liu, “Sandisk's rebranded Optimus SSDs now available ...”, published 2026-02-07, read at source 2026-09-24. Reported, not measured by us.
What to watch in consumer SSDs this event
Consumer NVMe is where event marketing concentrates, and it is also the category where a percentage off list has been least trustworthy in 2026. The reason is not mysterious: NAND prices rose sharply from late 2025, list prices were revised upward with them, and a revised list price is exactly what an event discount gets measured from. A drive can show a large percentage off during the event and still be priced above where it sat a few weeks earlier. That is why every row in the table above carries a verdict against the drive's own recorded price rather than a discount figure.
This page counts consumer SSD as every M.2 NVMe drive we track, whichever of our two internal labels it sits under. Most of our consumer M.2 catalogue is stored under the PS5-compatible set, because nearly every current consumer Gen4 and Gen5 drive meets Sony's slot requirement; the rest is stored as plain SSD with an M.2 form factor. Enterprise U.2, U.3 and SAS drives are excluded by form factor - they are a different market with different pricing, and the enterprise page covers them.
Capacity is the variable most worth fixing before the event starts. Price per gigabyte does not fall smoothly as capacity rises: at some sizes the next tier up is cheaper per gigabyte, at others the curve bends the wrong way, and the shape changes week to week. Decide the capacity you actually need, then read the verdict on the drives at that capacity. A deal on a size you did not need is not a saving.
Two structural facts sit under the numbers. First, Gen5 drives carry a premium over Gen4 at the same capacity, and we publish no speed comparison to justify or dismiss it - that is a performance question and we do not answer performance questions. Second, DRAM-less designs are common at the budget end and are a specification, not a verdict. Both appear on our gaming SSD pages as disclosures, not rankings.
The renamed drives: WD Black and Blue are now also SanDisk Optimus
At CES 2026 SanDisk renamed its consumer internal SSDs. Its own press release, dated 5 January 2026, says the SANDISK Optimus line was previously branded WD Blue, including the WD Blue SN5100; Optimus GX was previously WD_BLACK, including the SN7100; and Optimus GX PRO was previously WD_BLACK, including the SN8100. Tom's Hardware, reporting the first retail listings on 7 February 2026, described the change as a fresh label on existing hardware. SanDisk's release does not itself say the hardware is unchanged, so we attribute that reading to Tom's Hardware rather than state it as SanDisk's claim.
For a buyer the consequence is practical: during the transition both names are on sale at once, and they are not priced together. The panel above computes the gap live wherever we hold the same family, capacity and heatsink state under both names, new against new. Where we hold only one name at a capacity, it says so rather than inventing a comparison. The reported gap from February - $1,799.99 for the Optimus GX Pro 8100 4TB against $1,289.99 for the WD Black SN8100 4TB, both on SanDisk's own store, per Tom's Hardware - is shown beside our figure as reported, not as something we measured.
We are deliberately strict about what counts as the same drive. A listing titled Optimus GX PRO 850X exists in our catalogue, and it would be easy to pair it with the WD Black SN850X. SanDisk's announcement never mentions the SN850X, so we do not pair them. The SN7100X, sold for a handheld console, is a different SKU and is excluded too. The rule is the one this site applies everywhere: only what the source says.
What June's Prime Day measured for this category
Our June 2026 retrospective measured SSD (all interfaces) - every SSD we tracked then, mostly enterprise, because consumer M.2 tracking had not yet started. On the matched-model index, where each listing is compared only with its own earlier price, the category moved +0.00% from the 30 days before the event through its last day (2026-06-23 to 2026-06-26), with at least 45 listings matched at every step, and +0.00% in the week after. Among listings whose price had actually moved, 15.4% sat at their own recorded low during the event (13 listings), against 15.4% in an ordinary week - no more lows than usual.
The trap: the same drive under two names, at two prices
The event-week trap in this category is not a counterfeit or a fake discount. It is a legitimate drive listed twice, once under its old WD name and once under its new SanDisk Optimus name, and the gap between the two prices can be large. A buyer who searches only the name they know can pay the higher of two prices for identical hardware - or, as Tom's Hardware found in February, pay a premium on the new name at the manufacturer's own store.
The defence is cheap: search the family number, not the brand. SN8100 and GX PRO 8100 are the same family; SN7100 and GX 7100; SN5100 and Optimus 5100. Compare like with like - same capacity, same heatsink state, both new - and buy whichever label is cheaper on the day. The verdict badge then tells you whether that cheaper price is actually low for that listing.
An event is not a reason to buy an SSD. If the drive you have is not full and not failing, the right purchase this week is none. The event is a good time to buy a drive you had already decided you need - at a capacity you chose before the banners went up - and only when its own badge says the price is low for it.
The standing consumer ssd pages
- Gaming SSD hub - Gen4 vs Gen5 priced like-for-like, no speed claims.
- PS5 SSD - Sony's slot requirement and heatsink pairing.
- Samsung 990 Pro - The most-quoted event SSD, tracked live.
- SanDisk microSD lines - The brand's card range, one row per card.
- SSD price forecast - Directional outlook from our matched index.
- Enterprise NVMe - U.2 and U.3 - a different market.
Frequently asked questions
Are Prime Big Deal Days SSD deals real?
Individual deals can be real and low; the category as a whole did not move in June. Our June retrospective measured every SSD we tracked then and found the matched-model index essentially flat across the event. Today 19 of 128 in-stock items sit at or near their own recorded low today - the badge on each row tells you whether that specific drive is low for itself.
Is the SanDisk Optimus the same drive as the WD Black?
SanDisk's own January 2026 release says Optimus GX PRO was previously branded WD_BLACK including the SN8100, Optimus GX including the SN7100, and Optimus including the WD Blue SN5100. Tom's Hardware describes it as a new label on existing hardware. Compare by family number, capacity and heatsink state.
Which name is cheaper right now, WD or Optimus?
Today we hold no matched pair - no family, capacity and heatsink state under both names at once, new against new - so we cannot say. WD Blue SN5100 at 2TB; no SanDisk Optimus 5100. WD_Black SN7100 at 2/4TB; no SanDisk Optimus GX 7100. WD_Black SN8100 at 1/2/4TB; SanDisk Optimus GX PRO 8100 at 8TB.
Why is a percent-off figure not enough?
Because list prices in storage were raised through 2026, and a discount measured from a raised list price says how far the list moved, not whether today's price is low. PCMag's own June Prime Day coverage said as much about its featured SSD deal. We compare each drive with its own recorded history instead.
Should I buy Gen5 or Gen4 during the event?
That is a performance question, and we do not publish performance claims. What we can give you is the price side: our gaming SSD pages compute the Gen5 premium like-for-like at matched capacity. Decide whether what Gen5 offers you is worth that share of the budget.
What does TRACKING mean on a drive?
It means we have fewer than seven days of that listing's own price history, so any verdict would be a guess. 3 of 128 rows read that way today. We show the badge honestly rather than inventing a low from a short record.
Other Prime Big Deal Days categories
External hard drives · Portable SSD · microSD · PS5 SSD · NAS devices · Consumer RAM · Enterprise & refurbished · the event hub
A category page exists only while it lists at least 4 in-stock products. Prices and badges are live; this page shows no historical price for any listing.