We're going to need a lot more information to have any hope of answering your question. To begin with, a topic of "help" doesn't give any idea of what the problem is, and will cause many potential readers to skip over your thread entirely--if you change it to something descriptive, you'll have a better chance of people reading the thread, and therefore a better chance of people answering.
Second, you're going to need to provide information about your system--what hardware, what version of FreeNAS (if you've been running the same version for the last 5 years, this is the wrong forum--you need nas4free.com), what drive configuration, how your storage is set up, how your sharing is set up, what you've changed recently, how full your storage is, what folders are causing problems, etc. If you look at the red "Forum Rules" link at the top of the page, it should give an indication of what you'll need to provide.