I have problem with storage on my iphone.

I have problem with storage on my iphone 6. Before i uppgrade to the newest ios. I had 100 Gb free. Now i have nothing free. and iphone keeps saying that my storage is full. And does not work propperly
Need help fast thanx

Purchasing more Storage on iCloud will not increase the Storage Capacity of your iDevice.
You need to Delete Content from your iDevice...
Goto... Settings > General > Usage > Storage = Then Delete Content...
See Here  >   http://osxdaily.com/2013/07/24/remove-data-storage-iphone-ipad/