1# sync<a name="EN-US_TOPIC_0000001133846490"></a> 2 3- [Command Function](#section1285017122274) 4- [Syntax](#section4731516162712) 5- [Parameters](#section9352418122714) 6- [Usage](#section10725192142717) 7- [Example](#section414434814354) 8- [Output](#section19618121710317) 9 10## Command Function<a name="section1285017122274"></a> 11 12This command is used to synchronize cached data \(data in the file system\) to an SD card. 13 14## Syntax<a name="section4731516162712"></a> 15 16sync 17 18## Parameters<a name="section9352418122714"></a> 19 20None 21 22## Usage<a name="section10725192142717"></a> 23 24- The **sync** command is used to refresh the cache. If no SD card is inserted, no operation will be performed. 25- When an SD card is inserted, the cache information is synchronized to the SD card. If the synchronization is successful, no information is displayed. 26 27## Example<a name="section414434814354"></a> 28 29Run **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. 30 31## Output<a name="section19618121710317"></a> 32 33None 34 35