| Error | Probable Cause | Solution | |-------|----------------|----------| | Device not detected | Missing driver / wrong mode | Reinstall Samsung USB driver; reboot to Download Mode with USB already plugged. | | PIT write failed | Secure check enabled (VaultKeeper) | Unlock bootloader officially via Developer Options first. | | EFS backup corrupted | Incomplete read | Retry after a device reboot; ensure no other software (Smart Switch) is accessing the device. | | NAND repair stuck at 45% | Physical bad block | Use “Skip bad block” option – device may need mainboard repair. |

: Temporarily disable antivirus or Windows Defender, as these programs often flag specialized service tools as false positives.

: Allows users to read, write, and wipe critical partitions, including EFS , NV Data , and Security files to fix boot or network issues.

: The primary tool for managing Samsung SSDs. It allows for firmware updates, performance monitoring, and secure data erasure. You can find the latest version on the Samsung Semiconductor Support Page Samsung Flow

Perform a software update * Using two fingers, swipe down from the top right corner of the screen, and then tap the Settings icon. samsung.com How to update your Galaxy phone or tablet - Samsung