The Sleuth Kit is a C++ library and collection of open source file system forensics tools that allow you to, among other things, view allocated and deleted data from NTFS, FAT, FFS, EXT2, Ext3, HFS+, and ISO9660 images.
...Block forwarding, uploading to unauthorized cloud services, or syncing to personal drives.
Apply time-based access (expiration dates) and geo/device restrictions.
Maintain tamper-evident audit trails for compliance and forensics.