This describes the files that SHOULD be in the Lacerte backup.

Open C:\ConversionData to view the files that you backed up. A valid Lacerte backup looks like a Lacerte database folder and contains the following for each tax type:

• 8 Database files with names starting with DATA and ending in .DBF.
• 8 Database files with names starting with DATA and ending in .MDX.
  • For example, for Individual, you'll see DATA1I18.DBF–DATA8I18.DBF and a corresponding MDX for each. For Corporate, it'll be DATA1C18–DATA8C18.
  • It's OK to back up all clients into the same folder, as the file names differentiate by tax type.
• Several folders, including DETAIL.
• Within the DETAIL folder, one file for each client backed up, with an extension of .?D8, where the "?" represents the tax type.

A valid backup must contain the entire file and folder structure. The conversion process won't work if we receive only detail files.

From this link https://proconnect.intuit.com/community/convert-data-files/help/lacerte-backup-instructions-for-data...

Someone at Lacerte should be the ones to help you get those staight.