Optimize store for large datasets

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

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

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

Start by locating the lib implementation related to the store and inspect its current error-handling paths. Clarify whether the requested optimization or the more descriptive error messages is the intended scope; done should mean the relevant failures provide detailed, useful messages and the large-dataset behavior is improved.

Written by the indexing model from the issue text.