There are several steps to help recover a deleted file or document:
Check Recycle Bin – often files can be restored from the Recycle Bin
Retrieve from a Backup – many operating systems and software provide backup options, allowing you to retrieve files from previous versions
Use File Recovery Software – there are many data recovery programs available, both paid and free, which can be used to recover deleted files
Contact the Recipient – if you have sent a file, you likely sent it to someone. Check with them to see if they still have a copy of the file.