Fake SD Card Test & Capacity

💾 A card that says 512 GB may hold 64 GB. Counterfeit cards and USB drives report a size they do not have. The controller lies, so your phone believes it and everything looks fine until the day your photos come back as grey squares. Checking the size does not help, because the size is the lie. The only way to know is to write data across the whole card and read it back. That is what this app does. ■ Who this is for · You bought a card or a USB drive online and want to check it before the return window closes · You are about to trust a card with photos or video you cannot replace · A card has started losing files and you want to know whether it is worn out or was never the size it claimed ■ The two tests ⚡ Quick test Claims space right across the card, drops markers through it, and reads those markers back. A card that pretends to be bigger than it is wraps around and overwrites the earlier markers, which is what the markers look for. Allow roughly a minute per gigabyte, because the space still has to be written once. 🔍 Full test Writes over every byte and reads all of it back, so it takes about twice as long. This one tells you whether every part of the card is good, not just whether the size is honest. ■ What you get 📊 Progress you can actually follow Percentage, how much has been done, the speed in MB/s and how long is left. Not a bar that sits still while you wonder whether anything is happening. 🚩 A plain answer Genuine, false capacity, worn and failing, or did not finish. If the capacity looks false, the app shows roughly how much of what it wrote could be read back, a rough guide to what the card really holds. 📄 A report you can send Save it as a text file or send it straight to a seller or a marketplace. It has no serial number and no account details in it. 🔌 Memory cards, and USB drives where your phone allows it Mounted cards are listed next to the internal storage. A USB drive on an OTG adapter can be tested only if your phone makes it available to apps, which not every phone does. If it is not listed, the app cannot reach it. ❓ An answer when the card does not show up at all A card can go missing for three different reasons and each one needs something different from you. If it was formatted on a computer it may be NTFS, which Windows reads and Android does not. If it does not appear anywhere on the phone, it has stopped answering, and no format and no app can bring that back. The app lays out which one you are looking at instead of just saying nothing was found. ■ Good to know · Free · No account and no login · The test runs entirely on your phone and works without a connection · Asks you for no permissions at all · Ads never write anything to your card · Your existing files are not touched. The app writes only into its own folder and deletes those files when it finishes · The app reports anonymous counts of what kind of test was run and how it came out, never the card's identity and never your report ■ Honest limits This app cannot repair a counterfeit card. Nothing can. The flash inside is simply smaller than the label says, and reformatting does not create memory that is not there. What the app can do is tell you before you lose something. The app cannot format a card either. Android keeps that for the system alone, so the app opens the storage settings for you and the phone does the formatting. A phone can only reach the card through the file system, so the quick test works by claiming space rather than by addressing raw sectors the way a desktop tool can. That spots most cards that fake their size, but some cards can hide it from a quick check. The full test writes and reads every byte, so if you need certainty, run the full test. The way the app tells a fake card from a worn one has been checked against simulated fake cards, not yet against a large set of real counterfeits. Questions: [email protected]