C:\Users\[Your Username]\AppData\Local\BANDAI NAMCO Games\ACE COMBAT ASSAULT HORIZON\
C:\Program Files (x86)\Steam\userdata\[Your_Steam_ID]\63010\ ace combat assault horizon save game
C:\Program Files (x86)\Steam\userdata\[Your Steam ID]\213090\remote\ Go to Windows Security > Virus & Threat
Are you trying to or install a 100% completion file ? What specific error message (if any) are you seeing? Share public link ace combat assault horizon save game
Controlled Folder Access in Windows Security sometimes blocks legacy games from writing to the AppData or Documents directories. Go to Windows Security > Virus & Threat Protection > Manage Ransomware Protection, and add Ace Combat to the allowed apps list. Issue 3: Steam Cloud Conflict Messages
C:\Program Files (x86)\Steam\userdata\[Your Steam ID]\228400\remote
Older retail disk copies of Ace Combat: Assault Horizon utilized Microsoft's defunct Games for Windows Live service. If you are playing an archived retail copy, the game may refuse to save because it cannot connect to the dead servers.