Used MacBook about 10-15 times for no more than 1 hour at a time. Apple said a Safari update was needed on older system. Computer would not start again. Replaced Zheino drive and reloaded backup of system and computer worked again. Tested Zheino drive after reformat to windows and drive all but quit after testing 7% of the surface. To be fair I have had a different brand SSD fail in another laptop but it took 2 years. Tried warranty, company wanted me to mail it back to China and wait for them to mail a new one. That would would cost more than a new SSD from Amazon and take way to much time. I think Zheino products are not worth taking a chance. I am sorry Amazon does not have direct return to Amazon during warrenty period.