QB Issue Resolution:

Those are folders. If you hardly ever Search, you don’t need the index constantly updated. You control this in Preferences.

Otherwise, you would hit the Update Index manually, before doing a Search.

As far as “searching” for a file, in Windows or Explorer: are you using Wildcards? Search on *.qbw and not *.qbw*

Resolution for Issue 'Why do we now have to suffer additional QB files qbw.searchindex?' available: Yes (Solved).
Source: Intuit Community forum.

Why do we now have to suffer additional QB files qbw.searchindex?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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