Talk:Steam Deck Q&A

detect fake microSD cards

To test microSD card for fake capacity on Linux:

Unmount the card.
Run full test (long, hours for 512GB):
sudo f3write /path/to/mount/point
Then sudo f3read /path/to/mount/point
Run quick test (minutes, destructive):
Confirm device (e.g., /dev/sdd) with lsblksudo f3probe --destructive --time-ops /dev/sdd

If quick test reports much less than labeled capacity or errors, card is fake.

PNY Premier-X 512GB A2 microSD

PNY Premier-X 512GB A2 microSD

mmblk0 - 464.38 GiB