HarmonyOS USB数据开发指导

await TimeUtil.sleep(3000);
let volumes: Array<volumemanager.Volume> = await volumemanager.getAllVolumes();
uDiskPath = volumes[0].uuid;
let bufSize = 4096;

let originFile: string = '/storage/External/' + uDiskPath + '/testUsb.mp4';
let desFile: string = '/storage/External/' + uDiskPath + '/test1/RunHistory' + count++ + '.mp4';
LogUtils.i(PAGE_NAME, 'current count ' + desFile);
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参考链接：https://gitee.com/openharmony/docs/blob/master/zh-cn/application-dev/reference/apis-core-file-kit/js-apis-file-volumemanager-sys.md