Abstract-Cloud processing is the figuring innovation which gives assets like programming, equipment, administrations over the web. Cloud computing gives calculation, programming, information get to and capacity benefits that don't require end-client learning of the physical area and setup of the framework that conveys the administration. Since the information transmission on the web or over any systems are defenceless against the programmer assault. Cloud based information capacity frameworks have numerous complexities with respect to basic, private, delicate information of customer. The trust required on distributed storage is so far had been restricted by clients. The information stockpiling in the cloud has been a promising issue in these days. This is because of the way that the clients are putting away their significant information and data in the cloud. The clients ought to believe the cloud specialist organizations to give security to their information. The cloud specialist organizations likewise giving the security however not up to a total level. The assault of noxious insiders into the cloud and to take the information has been expanded. Information store is fundamental future that cloud benefit gives to the organizations to store gigantic measure of capacity limit. Yet at the same time many organizations are not prepared to actualize distributed computing innovation because of absence of legitimate security control approach and shortcoming in insurance which prompt to many test in distributed computing. This paper deals about the study on various issues identified with information stockpiling security on single cloud and also multi cloud what's more, adaptation to internal failure.