# sync<a name="EN-US_TOPIC_0000001133846490"></a>

-   [Command Function](#section1285017122274)
-   [Syntax](#section4731516162712)
-   [Parameters](#section9352418122714)
-   [Usage](#section10725192142717)
-   [Example](#section414434814354)
-   [Output](#section19618121710317)

## Command Function<a name="section1285017122274"></a>

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

## Syntax<a name="section4731516162712"></a>

sync

## Parameters<a name="section9352418122714"></a>

None

## Usage<a name="section10725192142717"></a>

-   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<a name="section414434814354"></a>

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<a name="section19618121710317"></a>

None