chrome 插件 chrome.storage 最多数据写入

报错信息

Unchecked runtime.lastError while running storage.set: 
QUOTA_BYTES_PER_ITEM quota exceeded at Object.callback

   var info = {
        uName : msdata.uName,
        Ocode : msdata.Ocode,
        Ycode : msdata.Ycode,
        Zcode : msdata.Zcode,
        UMsg  : msdata.UMsg,
        Ycop  : msdata.Ycop
   };   
    
   var  obj = {};  
    
    chrome.storage.sync.get('orderInfoAll', function(data) {               
        console.log(data.orderInfoAll.length);                      
        if(data.orderInfoAll){            
            console.log('追加');
            obj.orderInfoAll = data.orderInfoAll;          
            obj.orderInfoAll.push(info);    
            
        }else{
           obj.orderInfoAll = [];          
           obj.orderInfoAll.push(info);     
            console.log('初始');   
        }   
        
       chrome.storage.sync.set(obj,function(data2){            
            PL.open({
                content: '成功写入',
                time: 2
            });
        })
                        
    });

在数据加到 60 条后 报错 超过配额？ 如何破？