On iTunes when i plug my iphone in, the bar at the bottom with contains the information about the capacity of my iphone, it has a bar called 'other' which has 4GB. I don't know what is taking up that space or how to get rid of it. please help :)

You can reduce the size to normal, which is about 1GB, by restoring the phone.

Backing Up, updating, and restoring your iPhone and iPod touch software

The size of this part can increase when something goes wrong during a sync, or some files can't be read anymore by iTunes.

No problem, glad I could help 🙂

Hi

Could u please inform me about "when something goes wrong during a sync, or some files can't be read anymore by iTunes" and how to correctly sync the device ? I seem to having the same problem with the "other"!!