Power-off possible.
Save your files to cloud storage before powering off!
You should always save your work to your cloud storage drive before powering off. If you only save files to the local drive of the instance (e.g., C: drive), those files wont be there the next time you come back. If you are an end user of an account managed by another administrator, then you will be running stateless sessions where nothing is stored locally - so you have to save everything to your cloud storage account.