[BetterRed]

In Word, if you tick Options->Advance->Save->Always create backup copy - then when you do a save it renames the current file to Backup of <document name>.wbk, which can be opened and 'converted' to a doc(x) if/when the need arises. But only one backup.

This is a separate 'thing' to the recovery copy. Then there's the Windows Previous Versions feature - it relies on system Restore Points, which I take at the start of day. I used it once to recover a trashed metadata.db.

In Excel the option to create a backup copy is specified at the workbook level rather than globally as in Word - hence the weird extension for Word Backups. Again only one backup.

The backup utility I use (Goodsynch) will keep as many 'earlier' backups as you desire for as long as you desire - I note that FFS also has a Versioning option which I suspect is similar (ie multiple backups). And both will do it in real time - just configure for the file types you edit - eg EPUB, DOCX, etc - but not the database .opfs etc.

BR