Cloud storage is basically a backup plan. Personally I don't like it. I do not believe in your circumstances that cloud storage can take data off of your computer. It is possible that defaults could change with programs and cloud storage would be the default location for new data. If you can not find your data (it should still be there) you need to explore the default locations for the programs you have used and search for it. You could have made a mistake and eliminated it but if you did your installation specifying that programs and data should be preserved, it should still be there. If that is the case start searching for any cloud backups that may exist. This may help understand the cloud system a little better but will probably reinforce your dislike or mistrust of it. I hope you had redundant backups or images before you did this. https://computer.howstuffworks.com/cloud-computing/cloud-storage3.htm