LockedFiles

Files locked for editing

Open the Shared Folders Microsoft Management Console (MMC) snap-in: Click Start > Run. Type fsmgmt.msc and click OK. The Shared Folders Microsoft Management Console (MMC) snap-in opens. Connect to the server that has the SMB shares: Click Action > Connect to another computer. Type the IP address of the server you want to connect to in the Another computer field and click OK. In the left pane, click Open Files. All open files in SMB shares are listed in the right pane. In the right pane, view locks on a file under the # Locks column. The number of locks is displayed under the # Locks column and the type of locks is displayed under the Open Mode column.

If folders are locked that are local process explorer can be used to identify the process locking the file: https://download.sysinternals.com/files/ProcessExplorer.zip