Default Internal storage problem?

My phone has been constantly rebooting, unexpectedly removed sd card error message and constant touch wiz has stopped working errors... And now I seem to an internal storage problem, I had hardly any space left because it said I had so much on pics but I didn't because I put them on to my sd card so I done a factory reset then my internal space was fine however since then my picture space has gone from 45mb to 499mb even though I haven't taken any pics and there's no pics on the internal storage to warrant the 499mb of pics it's telling me I have

Anyone help? I'm running the latest stock 4.3

Sent from my GT-I9505 using xda premium