How to set a security password in flashdrive

Hi guys,

Here's my Kingston 8 GB Flash drive.
- I want to set a security password on it because of my sister's always keep on eye of my drive without any permission. I have lots of important documents and software in there and every time she used it some of my files were gone and deleted.
- And in addition some files has been corrupted due to unwanted viruses detect on the drive so better to set a security pass.
- So maybe you can help me and give some instructions on how to set a security password on flash drive.
Feel free to post and I’ll be glad to read your answers thanks
