05-27-2020 08:43 AM
05-30-2020 10:45 AM - edited 05-30-2020 11:07 AM
You need to run data recovery software to recover the lost data. Now do not try to copy of paste or move any data from anywhere in the computer otherwise it will be hard to recover the deleted/lost data. Chances of recovery also depends on various factors.
You can try various free as well as paid software's in the market. It takes time and much patience as well as luck in the end.
05-30-2020 10:58 AM
Ways of recovering of files are listed here http://www.repairmsexcel.com/blog/recover-deleted-excel-file-not-in-recycle-bin, but it looks like that's not your case.
What is strange files were removed on Office update. On which version of Office you are and it was update or upgrade?