Used Storage Different on iTunes & iPhone

Hello,

My iPhone has been popping up with the message "Storage Almost Full" recently and it started to bother me. I ended up clearing all Apple Music iCloud downloads from my phone as i thought that was the reason. But then it came back again so I started looking into it.

I added up all the data used in the Usage section of the iPhone and its about 3.5-4 GB of storage used out of hte 11.2 GB of storage it says i only have 748MB left.

When I plug it into iTunes it shows the correct amount of free storage (around 6.4 GB). I tried hard resetting my iPhone too but it wont refresh.

Can anyone assist with this? Or was anyone able to solve a similar problem?

Appreciate the help,

Brent