External drives · Passwords and encryption
How do I stop my Mac asking for an encrypted drive's password every time?
Short answer: Tick "Remember this password in my keychain" when you unlock the drive. Your Mac then unlocks it automatically when you're logged in, while other computers still need the password. Remove the keychain entry to stop it later.
When you unlock the drive, tick Remember this password in my keychain in the password prompt. Your Mac then unlocks that drive automatically whenever you're logged in. Other Macs still need the password, so the drive stays protected if it's lost.
If you didn't tick it, eject the drive, plug it in again and tick the box this time. To stop remembering it later, delete the drive's entry in Keychain Access.
An encrypted fast drive that unlocks automatically is the smoothest setup with Storage Studio, because moved apps and folders become reachable as soon as the drive mounts — see using an encrypted drive with Storage Studio.