core/services/fs/src/docs.md

## Capabilities

This service can be used to:

- [x] create_dir
- [x] stat
- [x] read
- [x] write
- [x] delete
- [x] list
- [x] copy
- [x] rename
- [ ] ~~presign~~

## Configuration

- `root`: Set the work dir for backend.
- 
You can refer to [`FsBuilder`]'s docs for more information

## Example

### Via Builder


```rust,ignore
use std::sync::Arc;

use anyhow::Result;
use opendal::services::Fs;
use opendal::Operator;

#[tokio::main]
async fn main() -> Result<()> {
    // Create fs backend builder.
    let mut builder = Fs::default()
        // Set the root for fs, all operations will happen under this root.
        //
        // NOTE: the root must be absolute path.
        .root("/tmp");

    // `Accessor` provides the low level APIs, we will use `Operator` normally.
    let op: Operator = Operator::new(builder)?.finish();

    Ok(())
}
```