: Many mobile scanning apps or digital cameras default to naming files by the date they were created. "21-dec_3" likely refers to the 3rd file created on December 21st .
If you are looking for this specific file in your own storage, you can use these steps on the Google Drive Search page : 21-dec_3 - Google Drive
: Use the Search Tools to filter by Date modified and select a custom range for December 21 of the relevant year. : Many mobile scanning apps or digital cameras
: Type "21-dec_3" (with quotes) into the search bar to find that specific string. : Type "21-dec_3" (with quotes) into the search
: If you remember if it was a PDF, image, or Spreadsheet, use the "Type" filter to narrow the results. Common Contexts for Similar Names
: Some security systems or automated loggers upload daily snapshots to Google Drive with date-stamped filenames. How to Find and Identify This File