Some very old saves from 3.52 M33 may show as “Corrupted Data” on 6.60. Use or Savegame Deemer to re-decrypt and re-encrypt them for 6.60.
: Confirm your current version in Settings > System Settings > System Information . 2. Resolving the "Version 9.90" Error psp 352 m33 upgrade to 660
: Ensure your PSP is at least 78% charged and plugged into a power source to prevent a "brick" (permanent software failure) during the flashing process. Some very old saves from 3