I don’t know what you mean by using the “secure file” option. I added the files off my phone into the secure vault. They were not accessible using iPad or Iphone without password after that, but they were accessible when the drive was inserted into my mac laptop.
I can imagine there is a step I missed but this seems to be more of a user design issue. Why would you have files behind a password for some devices but not all?
I do have secure access on my mac and was able to use that to again put them in the vault.
