System and method for a dynamic policies enforced file system for a data storage device

A method of interfacing between a file storage device for storing files, some of which have restricted access conditions, and an external device, the method comprising:

• a. storing said files homogenously on said file storage device,
• b. identifying permissions for sectorially accessing of said homogenously stored files as either unrestricted files or restricted access files,
• c. identifying permissions for sectors associated with said restricted access files according to said identified file permissions autonomously by said file storage device,
• d. allowing said external device direct-attached storage accessibility functionality for sectors of unrestricted files, whilst restricting accessibility functionality for sectors of restricted files according to said identified sectors permissions
• e. dynamically restricting access of at least part of externally accessible data portion by changing said identified permissions of said homogenously stored data from unrestricted to restricted for said data portion.

A method of protecting memory of an autonomous device coupled to an external device, the method comprising:

• a. storing data homogenously on certain part of said memory,
• b. identifying permissions for sectorially accessing of said homogenously stored data as either unrestricted portions of data or restricted portions of data,
• c. identifying permissions for data units associated with said restricted access portions of data according to said identified permissions of stored data,
• d. allowing direct access to data units of unrestricted portions of data, whilst restricting access to sectors of said certain homogenously stored files of data units of restricted data according to said identified permissions for data units,
• e. dynamically restricting access of at least part of externally accessible data portion by changing said identified permissions of said homogenously stored data from unrestricted to restricted for said data portion,
• f. decrypting encrypted data in at least part of restricted data of said data portion.

A data protection device comprising:

• a physical memory for storing data homogenously on certain part of said physical memory,
• an external direct-attached accessible interface for sectorially accessing data units of said homogenously stored data, and
• an internal inaccessible interface located above said external direct-attached accessible interface to limit access to sectors of data units of certain homogenously stored data portions according to an indication associated with respective data portions having a data access restriction wherein said file storage device autonomously associates sectors of said respective file of said certain homogenously stored files with access restriction of said respective file of said certain homogenously stored files, and
• wherein an indication associated with a data portion is changed from unrestricted to restricted for access outside of said device and an at least partially encrypted data is at least partially decrypted in at least part of said data portion.