Sync

iOS Device Backup 55237f35 This folder stores one local iPhone or iPad backup created by Finder or iTunes on your Mac. One Drive Mac Container This folder is the sandbox container for Microsoft OneDrive on Mac and can hold app data used for sign-in, settings, and sync-related state. System /System/iOSSupport/System is a macOS system folder used for iPhone and iPad compatibility features and should generally be left alone. I Application Support This iCloud Drive support folder can store CloudDocs session data and document version remnants, and it may grow large when sync or app versioning misbehaves. CloudKit User Caches Cache files used by CloudKit on macOS to speed up iCloud-related syncing and local access for apps that rely on CloudKit. Google User Caches This folder stores cached data used by Google apps on your Mac to speed up loading and reduce repeated downloads. Mobile Documents The ~/Library/Mobile Documents folder stores iCloud Drive and app document sync data used by macOS and many Apple apps. iOS Device Backup 00008140 This folder stores an iPhone or iPad backup created by Finder or iTunes, containing device data snapshots used for restore or migration. iOS Backups iOS Backup This folder stores a device-specific local iPhone or iPad backup created by Finder or older iTunes sync and backup features on your Mac. User Caches This folder stores temporary CloudKit cache data used by Apple’s cloud sync features to speed up syncing and local access. Caches This folder stores OneDrive cache data inside its macOS app container to help the app load, sync, and manage files more efficiently. icloudmailagent This folder stores temporary cache data for icloudmailagent, a background component related to iCloud Mail syncing and message handling on macOS.