Hi! Welcome to the samsung members community!
The problem with the secure folder is that you can't really do anything about it. The secure folder is designed for you and you only. It's important that if the information is that important, you remember the password. Unless... can you elaborate on what you mean by "not working"? Enter your PIN or pattern incorrectly 14 times (Android 14) or 20 times (Android 13 or earlier)
This is a members-to-members forum, so I can't assist directly.