SanDisk USB drive not sure why suddenly write protected
- see screen shot below - unable to Clean
as some I/O device error.
anyway to solve this problem?
Have you checked our knowledge base articles?
( Get Support for Your SSDs and Flash Products | Sandisk )
Try this one.
Write Protection is a way to prevent data loss on a drive. The solution would be to replace the drive if in warranty.
Drive Usage Exhaustion:
Drives write data to blocks. Blocks can fail or go bad based due to usage. USB drives have threshold for the number of good blocks to determine the health of the drive. The drive will write protect itself to prevent data loss when the number of good blocks is lower than the preset threshold.
Storage Blocks:
The drive keeps two copies of data on two different blocks. The primary and secondary block. The drive will go into write protection mode to prevent data loss when corruption occurs on both copies of the block.
When a SanDisk USB suddenly becomes write-protected, and Disk Utility or DiskPart shows I/O device errors, the controller has put the drive into read-only fail-safe mode. That happens when the flash memory starts reporting too many errors. I would say try another system.
If it fails, then there is no real fix. Treat it as read-only, get your data off, and replace it.
