Why Does My SD Card Keep Unmounting Randomly?
Hi all, I’ve been having a frustrating issue where my SD card randomly unmounts or disconnects while in use – sometimes during file transfers, other times just sitting idle. I’ve tried it on different devices, and it still happens. Could this be a hardware issue with the card, or is it more likely a software/compatibility problem? Any tips on how to diagnose or fix this would be really helpful.
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If your SD card keeps unmounting randomly, it could be due to a hardware issue (like a loose slot or damaged contacts), a corrupted file system, outdated device drivers, or power management settings interfering.
Try using a different card reader or USB port, update or reinstall drivers, disable any power‑saving settings on USB ports, run disk check (e.g. CHKDSK on Windows), and if needed back up your data and reformat the card. If the problem still happens, the SD card or the reader hardware is likely failing. Try another.