https://arstechnica.com/gadgets/2022/08/walmart-lists-a-30tb-portable-ssd-for-39-it-is-naturally-a-scam/ Skip to main content * Biz & IT * Tech * Science * Policy * Cars * Gaming & Culture * Store * Forums Subscribe [ ] Close Navigate * Store * Subscribe * Videos * Features * Reviews * RSS Feeds * Mobile Site * About Ars * Staff Directory * Contact Us * Advertise with Ars * Reprints Filter by topic * Biz & IT * Tech * Science * Policy * Cars * Gaming & Culture * Store * Forums Settings Front page layout Grid List Site theme Black on white White on black Sign in Comment activity Sign up or login to join the discussions! [ ] [ ] [Submit] [ ] Stay logged in | Having trouble? Sign up to comment and more Sign up this deal bytes -- Walmart lists a 30TB portable SSD for $39. It is, naturally, a scam But the "30TB" disk does at least try to fool users in clever ways. Andrew Cunningham - Aug 26, 2022 5:16 pm UTC If someone tries to sell you 30TB of solid-state storage for less than $40, consider turning around and running away, no matter how many clip-art rockets they use in their pictures. If someone tries to sell you 30TB of solid-state storage for less than $40, consider turning around and running away, no matter how many clip-art rockets they use in their pictures. reader comments 170 with 110 posters participating, including story author Share this story * Share on Facebook * Share on Twitter * Share on Reddit It feels like high-capacity SSDs are getting cheaper all the time, but in the words of a security researcher known as Ray Redacted on Twitter, there are still some deals that are too good to be true. In the spirit of discovery, he bought a "30TB" external SSD from AliExpress for $31.40, which also happens to be listed on Walmart's website for $39 (I am linking it for educational and entertainment value, please do not buy it). For those of you who are following this thread but not understanding the scam: Scammer gets two 512MB Flash drives. Or 1 gigabyte, or whatever. They then add hacked firmware that makes it misreport its size. Windows reports EXACTLY 15.0 terabytes. Not 14.89, Not 14.78 -- Ray [REDACTED] (@RayRedacted) August 26, 2022 But when you go to WRITE a big file, hacked firmware simply writes all new data on top of old data, while keeping directory (with false info) intact. H2Testw actually WRITES & then RE-READS its data. But the scammer slowed the bus down from 5 gigabits per second to .48 gigabits -- Ray [REDACTED] (@RayRedacted) August 26, 2022 On the inside, this "SSD" looks like two small-capacity microSD cards hot glued to a USB 2.0-capable board. This board's firmware has been modified so that each of these cards reports its capacity as "15.0TB" to the operating system, for a total of 30TB, even though the actual capacity of the cards is much lower. This is another giveaway; Windows reports drive capacities in gibibytes (1,024 mebibytes) or tebibytes (1,024 gibibytes), while drive manufacturers use gigabytes (1,000 megabytes) and terabytes (1,000 gigabytes). This is why a 1TB drive normally only has a reported capacity of 930-ish GB, rather than a nice round number. Advertisement On the inside, this "SSD" features what appears to be a pair of microSD cards or some other kind of cheap, low-capacity flash memory hot glued to a circuit board. Enlarge / On the inside, this "SSD" features what appears to be a pair of microSD cards or some other kind of cheap, low-capacity flash memory hot glued to a circuit board. @RayRedacted on Twitter The drive is even more clever when it comes to tricking people into thinking it's working. It preserves the directory structure of whatever you're copying, but when it's "copying" your data, it just keeps writing and rewriting over the tiny microSD cards. Everything will look fine until you go to access a file, only to find that the data isn't there. Replies to Ray Redacted's thread are full of alternate versions of this scam, including multiple iterations of the hot-glued microSD version and at least one that hid a USB thumb drive inside a larger enclosure. Fake USB storage devices are neither new nor rare, though this one makes spectacularly egregious claims about its price-per-gigabyte. When it comes to buying storage online, common-sense advice is best: stick to name brands, buy from trustworthy sellers (not just retail sites you trust--the Walmart listing is sold by "JD E Commerce America Limited," whatever that is), and know that if a deal seems too good to be true, it almost certainly is. reader comments 170 with 110 posters participating, including story author Share this story * Share on Facebook * Share on Twitter * Share on Reddit Andrew Cunningham Andrew is a Senior Technology Reporter at Ars Technica with over a decade of experience in consumer tech, covering everything from PCs to Macs to smartphones to game consoles. His work has appeared in the New York Times' Wirecutter and AnandTech. He also records a weekly book podcast called Overdue. Email andrew.cunningham@arstechnica.com // Twitter @AndrewWrites Advertisement You must login or create an account to comment. Channel Ars Technica - Previous story Next story - Related Stories Today on Ars * Store * Subscribe * About Us * RSS Feeds * View Mobile Site * Contact Us * Staff * Advertise with us * Reprints Newsletter Signup Join the Ars Orbital Transmission mailing list to get weekly updates delivered to your inbox. Sign me up - CNMN Collection WIRED Media Group (c) 2022 Conde Nast. All rights reserved. Use of and/or registration on any portion of this site constitutes acceptance of our User Agreement (updated 1/1/20) and Privacy Policy and Cookie Statement (updated 1/1 /20) and Ars Technica Addendum (effective 8/21/2018). Ars may earn compensation on sales from links on this site. Read our affiliate link policy. Your California Privacy Rights | Do Not Sell My Personal Information The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Conde Nast. Ad Choices