How do i recover a previous version of a saved odt file

Used “save” instead of “save as” on a revised file, & now want to recover the original file.

If you have activated the option ‘Always create a backup copy’ under > ‘Tools’ > ‘Options’ > ‘Load/Save’ > ‘General’ you will find the one previoiusly saved version in the ‘backup’ folder of your user profile.
Multiple backups (version history) are not supported by LibO itself.

OK - I did not know about that option. Checked it & backup was not turned on, but it is now! I guess the file is gone, at least the updates since my last backup to my external drive. Thanks, Lupp.