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# Windows Recycle Bin internal format
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## Locations
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### FAT drives:
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- Windows 95 native:	C:\RECYCLED\INFO (with ANSI records, folder deletion is NOT possible, format `00 00 00 00`)
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- Windows 95+IE4, 98SE:	C:\RECYCLED\INFO2 (with ANSI records, folder deletion is possible, format `04 00 00 00`)
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- Windows Me:		C:\RECYCLED\INFO2 (with ANSI records, folder deletion is possible, format `05 00 00 00`)
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- Windows Vista+:	C:\$RECYCLE.BIN\$I...
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### NTFS drives:
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- Windows NT4:		C:\RECYCLER\<UserSID>\INFO (with Unicode records, folder deletion is possible, format `02 00 00 00`)
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- Windows 2000, XP:	C:\RECYCLER\<UserSID>\INFO2 (with Unicode records, folder deletion is possible, format `05 00 00 00`)
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- Windows Vista+:	C:\$RECYCLE.BIN\<UserSID>\$I...
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## INFO and INFO2 files
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INFO is written by Win95 without IE4 (with ANSI records), and WinNT4 (with Unicode records).
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INFO2 is written by Win95 with Internet Explorer 4 shell extensions, Win98, WinMe (with ANSI records), Win2000, and WinXP (with Unicode records).
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Since some Windows versions combinations mix up ANSI records and Unicode records (e.g. Win95+IE4 and Win2000), these Windows versions break the recycle bin information file of each other.
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INFO and INFO2 is the index file containing all information about the deleted files. The data files are renamed to `Dxy.ext` (`x` replaced with the drive letter, `y` being a dynamic length integer, `ext` being replaced with the file name extension).
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### Header
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    type
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      PRbInfoHeader = ^TRbInfoHeader;
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      TRbInfoHeader = record
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        format: DWORD;         // Unsure if this is just a version field or some unknown flags...!
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                               // Win95 (without IE4): 00 00 00 00
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                               // Win95 (with IE4):    04 00 00 00
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                               // Win NT4:             02 00 00 00
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                               // Win Me, 2000, XP:    05 00 00 00
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        totalEntries: DWORD;   // Only Win95 (without IE4) and Win NT4, unknown purpose for other OS versions
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        nextPossibleID: DWORD; // Only Win95 (without IE4) and Win NT4, unknown purpose for other OS versions
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        recordLength: DWORD; // 0x181  =  INFO  structure (without Unicode)
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                             // 0x320  =  INFO2 structure (with Unicode)
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        totalSize: DWORD; // sum of all "originalSize" values;
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                          // Only Win95 (without IE4) and Win NT4, unknown purpose for other OS versions
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      end;
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### ANSI record (Win95, 98, Me)
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    type
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      // Windows 95:      INFO file with TRbInfoRecordA; Folder deletion NOT possible
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      // Windows 95 +IE4: INFO2 file with TRbInfoRecordA; Folder deletion possible
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      PRbInfoRecordA = ^TRbInfoRecordA;
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      TRbInfoRecordA = record
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        sourceAnsi: array[0..MAX_PATH-3] of AnsiChar; // 258 elements
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        recordNumber: DWORD;
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        sourceDrive: DWORD;
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        deletionTime: FILETIME;
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        originalSize: DWORD; // Size occupied on disk. Not the actual file size.
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                             // INFO2, for folders: The whole folder size with contents
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      end;
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### Unicode record (NT4, 2000, XP)
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    type
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      // Windows NT4:   INFO file with TRbInfoRecordW; Folder deletion possible
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      // Windows 2000+: INFO2 file with TRbInfoRecordW; Folder deletion possible
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      PRbInfoRecordW = ^TRbInfoRecordW;
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      TRbInfoRecordW = record
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        sourceAnsi: array[0..MAX_PATH-3] of AnsiChar; // 258 elements
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        recordNumber: DWORD;
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        sourceDrive: DWORD;
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        deletionTime: FILETIME;
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        originalSize: DWORD;
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        sourceUnicode: array[0..MAX_PATH-3] of WideChar; // 258 elements
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        unknown1: DWORD; // Dummy?
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      end;
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## $I... files of Windows Vista and above
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Beginning with Windows Vista, each deleted file gets its own information record. The information record ("index file") has the name `$Ixxxxxx.ext` while the data file is renamed to `$Rxxxxxx.ext` (`xxxxxx` replaced with a random `[0-9A-Z]` string and ext replaced with the file name extension).
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### Version 1 (Introduced in Windows Vista)
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    type
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      // Introduced in Windows Vista
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      PRbVistaRecord1 = ^TRbVistaRecord1;
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      TRbVistaRecord1 = record
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        version: int64; // Always 01 00 00 00 00 00 00 00
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        originalSize: int64;
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        deletionTime: FILETIME;
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        sourceUnicode: array[0..MAX_PATH-1] of WideChar;
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      end;
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### Version 2 (Introduced somewhere in a Windows 10 release)
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    type
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      // Introduced somewhere in a Win10 release
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      PRbVistaRecord2Head = ^TRbVistaRecord2Head;
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      TRbVistaRecord2Head = record
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        version: int64; // Always 02 00 00 00 00 00 00 00
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        originalSize: int64;
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        deletionTime: FILETIME;
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        (* sourceUnicode: BSTR; *)
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        sourceCountChars: DWORD; // including NUL
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        //sourceUnicode: array[0..sourceCountChars+1] of WideChar;
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      end;