> For the complete documentation index, see [llms.txt](https://guide.cronuszen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.cronuszen.com/gpcscripting/gpc-script-guide/data-and-persistence.md).
# Data and Persistence
Choose storage by lifetime and ownership, validate every load, and version persistent layouts.
Choose storage by lifetime and ownership, validate every load, and treat persistent layouts as versioned schemas.
***
Work through these pages in order the first time. Return directly to any page later as a reference.
* [Pick storage by lifetime and ownership](/gpcscripting/gpc-script-guide/data-and-persistence/pick-storage-by-lifetime-and-ownership.md)
* [Runtime variable budget](/gpcscripting/gpc-script-guide/data-and-persistence/runtime-variable-budget.md)
* [Const array design](/gpcscripting/gpc-script-guide/data-and-persistence/const-array-design.md)
* [Dynamic indexes](/gpcscripting/gpc-script-guide/data-and-persistence/dynamic-indexes.md)
* [Raw data layout](/gpcscripting/gpc-script-guide/data-and-persistence/raw-data-layout.md)
* [Strings, images, and ADT records](/gpcscripting/gpc-script-guide/data-and-persistence/strings-images-and-adt-records.md)
* [SPVAR storage](/gpcscripting/gpc-script-guide/data-and-persistence/spvar-storage.md)
* [Versioned save schema](/gpcscripting/gpc-script-guide/data-and-persistence/versioned-save-schema.md)
* [Manual bit packing](/gpcscripting/gpc-script-guide/data-and-persistence/manual-bit-packing.md)
* [BVAR storage](/gpcscripting/gpc-script-guide/data-and-persistence/bvar-storage.md)
* [Record identity and ownership](/gpcscripting/gpc-script-guide/data-and-persistence/record-identity-and-ownership.md)
* [Cache expensive persistent access](/gpcscripting/gpc-script-guide/data-and-persistence/cache-expensive-persistent-access.md)
* [Persistence test matrix](/gpcscripting/gpc-script-guide/data-and-persistence/persistence-test-matrix.md)
---
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