Time Machine - Back up not encrypted: Time Machine is backing up an encrypted disk to an unencrypted disk.

All new Macs (since 2018) are encrypted.

FileVault isn't really the encryption part. It is just the magic that allows the decryption login to continue to the user account login.

So, your disk is encrypted, and FileVault is off.

The Mac firmware does the encryption and decryption on its own. If you enable FileVault, then you control the encryption and decryption.

Hy Barney.

What you says makes sense. This is my Disk util Info screenshot about my internal SSD

It says that my internal SSD disk is not encrypted, while in parenthesis it say (encrypted without password).

What sounds strange to me is that I'm getting this warning since I've changed my TimeMachine disk, I've moved to an SSD drive (instructions here) and suddenly I'm getting this warning. I'm wondering if I'm risking losing my old backups.

I've checked, Barney. No, I haven't lost my backups. So, it's only a warning that data on the backup disk are not encrypted.

Thank you

Encryption will keep safe & secure your Time Machine backup disk. If you no longer want to encrypt your disk, you can turn off FileVault:

• Choose Apple menu > System Preferences, then click Security & Privacy.

• Click the FileVault tab.

• Click Locked, then enter an administrator name and password.

• Click Turn Off FileVault.

I don't know what effect that would have on your old backups. It's not anything I've looked into.