Support backup configuration

**Problem**
When working with store, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

No file, test, or entry point is named. Start by locating the store implementation and its current error paths, then review the surrounding handling and existing tests if present. Done means store failures produce detailed, useful error messages that improve debugging and maintenance.

Written by the indexing model from the issue text.