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.001 File Extension


File Type 1 Fax File  (Most common)
File Format File
Common? No
File Description Contains image data for a received fax
Program(s) that open 001 files Mac / Windows: Any image viewer or fax viewing program

File Type 2 Norton Ghost Disk Backup
File Format Proprietary File
Common? No
File Description Backup of a hard disk created with Norton Ghost; created when a backup is split into multiple files due to the 2GB file size limit in DOS; other parts of the split backup have extensions ".002," ".003," etc.

Split backups created with Norton Ghost also include a .GHO file, which contains information about the backup files and is necessary for restoring the backup.
Program(s) that open 001 files Windows: Symantec Norton Ghost

File Type 3 HJSplit Split Archive
File Format Proprietary File
Common? No
File Description First file of a split archive created with HJSplit, a file-splitter and joiner for Windows and Linux; used for splitting large archives into smaller, more manageable files; other parts of the split archive have the extensions ".002," ".003," etc.
Program(s) that open 001 files Windows: Freebyte HJSplit; Smith Micro StuffIt Deluxe for Windows; 7-Zip
Unix: Freebyte HJSplit for Linux

File Type 4 SplitJoin Split File
File Format Proprietary File
Common? No
File Description First part of a file split using SplitJoin, a file splitting and rejoining utility; used for breaking up large files into smaller ones; may be used for saving files on floppy disks or creating smaller e-mail attachments.

SplitJoin split files use the file extensions ".001," ".002," ".003," ".004," and so on; all pieces of a split file must be available in order for the file to be rejoined.
Program(s) that open 001 files Windows: SplitJoin

File Type 5 001 File Joiner & Splitter File
File Format Proprietary File
Common? No
File Description First part of a multi-part file split by 001 File Joiner & Splitter; saved with other parts of the file that use file extensions ".002," ".003," ".004," etc; used for reducing the size of large files into smaller pieces.

001 File Joiner & Splitter can be used to split large files and to join files that have already been split.
Program(s) that open 001 files Windows: WellTek 001 File Joiner & Splitter

File Type 6 Multimedia Fusion Backup File
File Format Proprietary File
Common? No
File Description Backup of a project (.MFA) file created with Multimedia Fusion, a game development program; generated by the program's Autobackup feature; allows the project to be restored in case the original file becomes corrupted or is accidentally deleted.

NOTE: Multimedia Fusion may create multiple backup files with the extensions ".001," ".002," etc, depending on how many backup copies have been selected in the program preferences.
Program(s) that open 001 files Windows: Clickteam Multimedia Fusion

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/001