Your synced files are stored in a new folder called Box Sync. Double-click on Box Sync in your Applications folder.
macOS Box Sync system requirements for macOS Content that syncs down to your computer is available for offline access, and if you make changes to the synced files locally, these changes automatically sync back up to your Box account. You can then navigate and modify content stored on the Box website through your computer’s native file browsing interface, without using a web browser.
Box Sync is a productivity tool that enables you to mirror data stored on Box to your desktop.
