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.OLD File Extension

Run a free scan for .OLD file extension errors.

File Type Backup File
Category Backup Files
Common? Yes
File Description Typically used as an indicator for a backup copy of a file; appended to the filename when a newer version of the file has been created or saved by a certain program; often placed after the orginal file suffix (i.e. document.doc.old would be a backup copy of the file "document.doc").

May be created automatically by a software program, but may also be created manually by the user; the ".old" extension may have to be deleted in order for the file to open correctly.
Program(s) that open old files
Mac OS Mac OS Original program used to create file
Windows Windows Original program used to create file
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Updated 9/24/07  
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