Password requirement for locking drive?

I have forgot my password. What I think is it force me to use something uncommon than I use as password. So if I can know what is the requirement for password maybe I can remember the password.
Example upercase lowercase etc!!


I don’t think it has any requirements for the password. I mean you can set up an all lower case or all upper case password without any issues. If you don’t remember your password the best thing to do here would be to format the drive in order to use it again. By formatting the drive it will delete the security but it will also delete any data stored in it.