Hi Oguz,
AltaVault acts like any NAS share with regards to file management. If you delete the file from an AltaVault SMB share, it will remove that file from cache AND the cloud. Think of the cache as a subset of the cloud data, representing a copy of the most recent files locally. The cloud represents your entire dataset. When the delete request occurs, we remove it from cache, and remove it from cloud. You no longer have the ability to recover the file from AltaVault because you've instructed it to delete it.
What you really want to do is forceably remove the cache contents, but maintain the cloud contents, so you can try to do a recovery of the data from cloud. To do this, you should do a DR or DR-test operation, as outlined in the Disaster Recovery chapter of the deployment guide (4.2), or administration guide (4.3). Refer to the AltaVault documentation for details on how to perform either of these operations. Note that if you're using the same appliance (rather than a secondary DR appliance), you do not need to do an export and import of the configuration - you would do the actions for DR or DR-test directly on the originating appliance (enable, configure terminal, no service enable, etc...)
Regards,
Christopher