Backup of Secret-1.0 folder

Hi there,

I’m trying to make a copy of the secret-1.0-folder in Deadalus to an USB-drive, but the secret-1.0-folder is empty. I’m on Mac so it is located in Application Support/Daedelus Mainnet. Should there be any files in there?

The secret-1.0 folder is only present as an artifact from older versions. It is not expected to have files there. Your 12/15/24 word mnemonics is your backup that you should preserve, any other method should be considered a hack that may or may not be supported in future.
The other encrypted private keys are currently part of sqlite DB in wallets folder, but that may change in future and is not the primary way to save keys.