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Invalid/Bad Dates - In some cases, partial data of a deleted file has been replaced by some new files, causing the header information of the deleted file cannot be retrieved.

Deleted - Files that had been deleted before the directory was deleted

Temporary folders - Microsoft Windows creates temporary folders when certain operations or programs start, and they are usually deleted after the operations or programs end.

FAT - File Allocation Table, FAT is used by the operating system to keep track of which clusters are allocated to specific files and which are available for use..

MHz - Megahertz (MHz), A measurement of frequency in millions of cycles per second.

RAID - This stands for Redundant Array of Independent Disks

NTFS - NTFS is the standard file system of Windows NT, including its later versions Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista, and Windows 7.

Partition - A logical section of a disk. Each partition normally has its own file system.

Path - A file location. It consists of directory or folder names, beginning with the highest level directory or disk name and ending with the lowest level directory name.

Directory - A list of file names and locations of files on a DISK..