Sorry to hear about this.
Unfortunately, there is no way to restore the cloud to a previous date. You will be able to restore files from the cloud but not move it to a previous date.
You may refer:
Let us know if you need help with anything else.
Feel free to update the thread.
Thanks for ypur answer, i know how to use cloud s functionnalyties, but my question is more: is adobe support able to restore and provide backups?
It is useless for mento sync anything as my files are corrupted, both on my cloud and my computer.
Thanks for your help
Arnaud, there is no backup of data that you save on Adobe cloud.
Thanks for your answer, so jus to understand well and improve my workflow, creative cloud is used to share project only and not to be used as a back up?
Your Adobe Creative Cloud account comes with online storage so that your assets are available to you anywhere and on any device or computer, however, if you have somehow lost the online backup, Adobe does not have any account of that lost data.
Please see: Creative Cloud file storage and quota