There are various disadvantages of cloud computing technology. The important disadvantages of cloud computing are given below.
1) Require a constant Internet Connection
Cloud computing is impossible without Internet connection. To access any applications and documents you need a constant Internet connection.
2) Require High Speed Internet connection
Similarly, a low-speed Internet connection makes cloud computing painful at best and often impossible. Web based apps often require a lot of bandwidth to download, as need to download large documents.
3) Stored Data Might Not Be Secure
With cloud computing, all your data is stored in the cloud. That's all well and good, but how secure is the cloud? Can't unauthorized users gain access to your confidential data?