The savedata.dat file (typically 66KB–80KB) contains:
No online DRM or account binding is present.
You have spent 100+ hours unlocking Lu Bu’s fifth weapon and maxing out every bodyguard. Do not lose it.
Cause: Windows VirtualStore or missing write permissions.
Fix: dynasty warriors 4 hyper save file work
Save this as backup_dw4.bat and run it weekly:
xcopy "C:\Users\%USERNAME%\Documents\Koei\Dynasty Warriors 4 Hyper\Savedata\savedata.dat" "D:\DW4_Backups\" /Y
echo Backup completed on %date% %time% >> D:\DW4_Backups\backup_log.txt
Set up a Task Scheduler to run this every Sunday.
Why this works: The game checks only those first 4 bytes to verify ownership. The rest of the data (weapons, unlocks) is not encrypted in a user-specific way—just obfuscated. By pasting your hash, you "sign" the foreign save as your own. The savedata
For advanced users, sometimes deleting the registry isn't enough. The game may still reject the file due to a checksum mismatch. Here is the manual method:
If you are trying to get Steam Cloud to sync your save file (fixing the "Start New Game only" issue), paste this into your Steam Launch Options:
PROTON_USE_DYLD=1 %command%
(Right-click the game in Steam > Properties > General > Launch Options.)
Cause: DirectX 8/9 wrapper missing or CPU affinity issue.
Fix: