Cloud Storage

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. 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. Mobile Documents The ~/Library/Mobile Documents folder stores iCloud Drive and app document sync data used by macOS and many Apple apps. 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.