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You are trying to open a newer database with an older version of Access (e.g., opening a Microsoft 365 file in Access 2013).

This can occur due to sudden power loss or a flaky network connection while the file is being written to. Which Access file format should I use? - Microsoft Support

You can import data from an Access file into an Excel workbook by going to the Data tab and selecting Get External Data > From Access .

Free tools like the MDB ACCDB Viewer allow you to browse tables and run searches without a full Office license. 2. Troubleshooting "Unrecognized Database Format"