iTunes showing 0.78GB in "other files" how to access"other files"?

q1.as can see in image. showing 0.78gb space reserved
"other files" , how can access area getting higher , higher day day ?

q2. "check updates" , " restore " both options disabled. i've no idea why

phone jb iphone4 ios 5.0.1 having 1.59.00 baseband....

 

is here answer post ?

 

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