Gradwell Cloud Drive tracks changes to your files, allowing you to revert to previous versions if necessary.
To do this, find the file in the web client and hover over the file name. Click History.
The stored versions of the file will be shown. Once you see the file you wish to recover hover over it and select Recover.
The file will be recovered to the same folder as the original file with a slightly different file name, allowing you to compare the versions as necessary.