打开sqlite异常

Android设备外接了U盘，想打开U盘中的sqlite数据库，无法打开，报错：Cannot create file private directory,such as:'www'

    dbName: 'GatewayData',  
    dbPath: 'file:///storage/0F20-1019/sqlite/GatewayData.db',  

openSqlite() {  
        return new Promise((resolve, reject) => {  
            // 打开数据库  
            plus.sqlite.openDatabase({  
                name: this.dbName,  
                path: this.dbPath,  
                success(e) {  
                //  console.log("数据库打开成功！");  
                    resolve(e);   
                },  
                fail(e) {  
                    console.log("数据库打开失败！原因：",e);  
                    console.log(e);  
                    reject(e);   
                }  
            })  
        })  
    },