There is no 'autosave' in Word. Only autosave recovery information and it seems that has worked. The backup function is virtually essential and will give you another layer of recovery. Only legitimate saves will be saved and the last saved version should be that with the original filename. Did you check out the 3 autorecovery files to establish what, if anything, they contained? Chances are that anything else useful will have been lost.

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com