You can remove files from Vault to delete them permanently.
On the web
Log in to app.drime.cloud/drive and go to the Vault section.
Re-authenticate with your Vault password.
Locate the file you want to remove.
Right-click the file (or use the three-dot menu) and select Delete.
Confirm the deletion; the file will be permanently removed from Vault.
Notes
Deleting a file from Vault is permanent; it cannot be recovered.
Make sure you really want to remove a file before deleting it.