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Backup data
File type: Backup file
Files with undo file extension are usually used by many applications for their backup files.
File type category:
Backup file
Date updated: June 6, 2017
Record marked as obsolete and not updated for a long time.
The .undo file extension is probably used by some applications for their backup files (documents, spreadsheets, projects, designs, images, etc.) during some process, so its possible to roll-back the changes.
Use compatible tools to work with *.undo files.
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