Hi

Having trouble with the sandbox. It is stuck on "Backup data set" and wont go any further.

Tried this one my existing project and created a new project with one table. Same issue.

Also tried clearing the data sets but that didn't help.

did you get it working? it did something similar to me a while back. did you try another browser? After you cleared datasets did you go to the sandbox and see what it shows under your projects?