# sync


## Command Function

This command is used to synchronize cached data (data in the file system) to an SD card.


## Syntax

sync


## Parameters

None.


## Usage Guidelines

- The **sync** command is used to refresh the cache. If no SD card is inserted, no operation will be performed.

- When an SD card is inserted, the cache information is synchronized to the SD card. If the synchronization is successful, no information is displayed.


## Example

Run **sync**. Data will be synchronized to the SD card if an SD card is available, and no operation will be performed if no SD card is available.


## Output

None.