SanDisk data recovery — cards, sticks & the counterfeit problem.

Genuine SanDisk media can be excellent hardware but experience terrible lives. Our case studies illustrate this perfectly. Corruption is where media failures begin; this includes the scenario where a user pulls a card mid-write, switches the media between cameras, phones and laptops, etc., or just wears the media down. In addition, we see many “the card needs formatting” situations that are caused by the reasons listed above, covered cause-by-cause in our SD corruption guide. Physical failure follows; these include snapped microSD cards, broken full-size SD cards, and/or damaged Cruzer USB sticks bent in laptop ports, and now comes the modern twist; since most SanDisk cards and many of its small sticks are monolithic units containing both the chip and controller in a single unit wafered together, there is no way to fix them via re-soldering, therefore all recovery will take place at the test point level on the monolithic piece of hardware (lab-level). Silent death, last but certainly not least, rounds out our list of failure types: the device was detected by no readers whatsoever, the controller is dead, but the contents behind it are still likely intact. Each of the three previous types of failures have recoverable paths; none of them will be helped by format.

SanDisk’s brand strength has created an entire counterfeit market. Counterfeiters sell products that have the exact same packaging as SanDisks but they use completely different chips in them. The counterfeiters also program their controllers so that it appears to be the correct capacity. Once the user reaches what would actually be the limit for their actual capacity, there will be no indication of this. Instead, the card will begin overwriting older files when the capacity is reached. Therefore, people experience “my new 256 GB card destroyed everything past the first weekend” (which is a story told word for word). Discounted items bought at a marketplace are how counterfeiters get access to consumers. A testing tool for measuring flash memory is the vaccination against being scammed by a counterfeiter. If someone buys a product that turns out to be a scammer’s creation, it is indeed possible to recover their information however it is much harder than if they had purchased a legitimate item. In addition to the numerous reports about counterfeit SanDisk SD cards, the SanDisk Extreme portable SSD series had its own issues in 2023. It was discovered that many units were failing due to faulty firmware/hardware. Afterwards, updates were made to address these failures. If your unit was manufactured during this time period, we recommend verifying whether or not it received the necessary update(s) through searching for your serial number online. As for both of these stories, neither indicates that you should avoid using SanDisk. Both simply remind us again that we must keep our important data backed up to prevent losing everything at once.

The DIY lane (cards are still being seen by your computer): stop using the card, use an actual reader, then carve with PhotoRec into a folder on your computer; the whole process is documented in the deleted-photos plan. The bench lane is for anything else: undetectable cards, damaged physically, monoliths, and the shoots which may be too important to have a first shot at home; this is our SD & memory card service, including monolith reads, with a free 48 hour diagnostic first. We will give you a fixed written quote, and in most cases you only pay if we recover your data. And whatever lane saves this one: creating a routine where each card is treated like a courier and photos are moved off it within days, or twice if they’re important enough to do so.