Users upgrading to Windows 11 have reported a significant decrease in available storage on their C: drive, attributed to the Capability Access Manager process consuming excessive disk space. Microsoft has acknowledged this issue and released an optional update (KB5095093) to improve disk space management for the CapabilityAccessManager.db-wal file, which can grow to several hundred gigabytes instead of the typical few megabytes. Users can check the file size in the directory C:ProgramDataMicrosoftWindowsCapabilityAccessManager, and tools like TreeSize or the command prompt can assist in this process. The CapabilityAccessManager.db-wal file functions as a write-ahead log for application access requests to system components, and its abnormal growth indicates it is not being properly merged back into the main database.