Even if the system allows you to set the password using € , you are taking a massive risk. The system might record the password using one character encoding method, but attempt to unlock it using a different one during boot.
Your password is a sequence of "Scancodes" (signals sent by the keyboard hardware) rather than actual characters. why can't i use the euro (€) symbol in my ssd password?
Here is why that breaks the Euro symbol: Even if the system allows you to set
The drive's firmware expects simple 8-bit characters (like letters, numbers, and basic symbols like @ or $ ). The euro symbol is a (specifically UTF-8 or Extended ASCII) character that requires more data to represent than the firmware can process. 🛠️ Why This Happens 1. Legacy Standards Here is why that breaks the Euro symbol:
Why? Because the BIOS/UEFI and the SSD firmware live in a pre-OS world that has no concept of multi-byte characters.