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next.js/docs/01-app/03-api-reference/05-config/01-next-config-js/turbopackFileSystemCache.mdx
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---
title: Turbopack FileSystem Caching
nav_title: turbopackFileSystemCache
description: Learn how to enable FileSystem Caching for Turbopack builds
---
## Usage
Turbopack FileSystem Cache enables Turbopack to reduce work across `next dev` or `next build` commands. When enabled, Turbopack will save and restore data to the `.next` folder between builds, which can greatly speed up subsequent builds and dev sessions.
> **Good to know:** The FileSystem Cache feature is considered stable for development and experimental for production builds
```ts filename="next.config.ts" switcher
import type { NextConfig } from 'next'
const nextConfig: NextConfig = {
experimental: {
// Enable filesystem caching for `next dev`
turbopackFileSystemCacheForDev: true,
// Enable filesystem caching for `next build`
turbopackFileSystemCacheForBuild: true,
},
}
export default nextConfig
```
```js filename="next.config.js" switcher
/** @type {import('next').NextConfig} */
const nextConfig = {
experimental: {
// Enable filesystem caching for `next dev`
turbopackFileSystemCacheForDev: true,
// Enable filesystem caching for `next build`
turbopackFileSystemCacheForBuild: true,
},
}
module.exports = nextConfig
```
## Version Changes
| Version | Changes |
| --------- | -------------------------------------------------------------- |
| `v16.1.0` | FileSystem caching is enabled by default for development |
| `v16.0.0` | Beta release with separate flags for build and dev |
| `v15.5.0` | Persistent caching released as experimental on canary releases |