Alcor Recovery Tool Online

The tool can map out damaged memory blocks by using reserve areas on the NAND chip. In “Setup → Scan Bad Blocks,” set the threshold to “Normal” or “Strict.” This reduces capacity but increases reliability.


  • Configure (optional):
  • Click Start (or “Space Start”) to begin.
  • Replug the USB drive.
  • Use Windows Disk Management to create a new volume if needed.

  • | Tool | Best For | Works With | |------|----------|-------------| | ChipGenius | Identifying controller manufacturer | Any USB drive | | HP USB Disk Storage Format Tool | Forcing format on write-protected drives | Many generic drives | | Rufus | Creating bootable USB + fixing bad sector flags | Any USB drive | | SD Memory Card Formatter | SD/SDHC/SDXC official spec format | SD cards only | | HDD Low Level Format Tool | Generic low-level erase | All storage devices | alcor recovery tool