corrupted odt file

Hi there

I have an odt file that I last worked on 4 months ago that is corrupted. I just realised, so I cannot look in the temporary folder. I tried turning it in zip etc but did not work at all. Also, the file was saved on an external hard drive.

when i open it it shows me lots of different weird characters. Anyone can help
many thanks

Upload the file here or on a file share site or on Google drive etc so someone can look at it.