Check if any temporary file is kept, or get data from source.
Or backup done by IT team if the file is on network drive.
Typically speaking, most IT will have Monthly/Weekly/Daily backup stored on backup server (most commonly, Network Attached Storage i.e. NAS server).
If not, check if they keep backup image of the drive.
It is always good idea to keep back up copy yourself, in local drive. I'd typically recommend keeping 3 backups (either done manually, or via code), 1 on local drive, 1 on network drive, 1 in secure cloud service. For business continuity purpose.
I learned the hard way, as I had one of more complex model stored on network drive... When the server died, I found that IT's backup process wasn't working for over a year. Took me 2 weeks to rebuild and validate against past reports.