Improve storage

[networkfusion]

Description

• Updates name of header
• Changes the drive path to a define
• Changes drive names to indexes for consistancy
• Stops enumerating directory paths when using SPIFFS drives

Motivation and Context

work towards #2849

How Has This Been Tested?

Screenshots

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue with code or algorithm)
• New feature (non-breaking change which adds functionality to code)
• Breaking change (fix or feature that would cause existing functionality to change)
• Config and build (change in the configuration and build system, has no impact on code or features)
• Dev Containers (changes related with Dev Containers, has no impact on code or features)
• Dependencies (update dependencies and changes associated, has no impact on code or features)
• Documentation (changes or updates in the documentation, has no impact on code or features)

Checklist

• My code follows the code style of this project (only if there are changes in source code).
• My changes require an update to the documentation (there are changes that require the docs website to be updated).
• I have updated the documentation accordingly (the changes require an update on the docs in this repo).
• I have read the CONTRIBUTING document.
• I have tested everything locally and all new and existing tests passed (only if there are changes in source code).

[Ellerbach]

That look indeed cleaner :-)

[Ellerbach]

why changing for 2?

[networkfusion]

My reasoning was that we know the length, so why base it off of a static field that should never change (as a compiler optimization. Happy to revert it though.