Fixing storing to hdf

[KasukabeDefenceForce]

:pencil: Description

Type: :beetle: bugfix

This PR aims at fixing 2622.

Also, link issues affected by this pull request by using the keywords: close, closes, closed, fix, fixes, fixed, resolve, resolves or resolved.

:pushpin: Resources

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:vertical_traffic_light: Testing

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• [ ] Other method (describe)
• [ ] My changes can't be tested (explain why)

:ballot_box_with_check: Checklist

• [ ] I requested two reviewers for this pull request
• [ ] I updated the documentation according to my changes
• [ ] I built the documentation by applying the build_docs label

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[wkerzendorf]

any fix that was not caught by our tests - should now have tests added that would catch them