It usually happens at the worst possible time. You have a brand new router, a vintage Android phone, or a bricked IoT device. You found the custom firmware (ROM) that promises to unlock its full potential. You fire up the flashing tool—Odin, SP Flash Tool, or Fastboot—and with bated breath, you click .
The flashing tool doesn't recognize the specific way the file was zipped. flash failed could not find end of central directory
The file was interrupted during download, leaving it truncated. It usually happens at the worst possible time
If you are using an SD card adapter, try a different one or a different USB port on your computer. Summary Checklist Redownload the file Fixes 90% of truncated files. Manual Workaround Extract with 7-Zip Bypasses the flasher's unzipping engine. Validation Match SHA-256 Hash Proves the file is 100% intact. Software Swap Use Rufus or Pi Imager Rules out software-specific bugs. You fire up the flashing tool—Odin, SP Flash
This is the most effective fix. A "truncated" download is the #1 cause of the missing EOCD record. entirely before redownloading.
How to Fix "Flash Failed: Could Not Find End of Central Directory"
If balenaEtcher or your flashing tool is struggling with the compression, handle the unzipping yourself.