I need help

Hello, first of all sorry for my bad english, english is not my first languae. I just bought minecraft and open it but when i try to change my skin or something there is a error named ''Veri depolama alanınız dolmak üzere! Ek depolama alanı açana kadar Minecraft bu özelliğe erişiminizi kısıtladı.'' But i have 100 gb or something like that free space in my computer, so i don't understand this error. Please help me to fix it.