Aplication for cloud storage in smartphone

Hi guys, I am new at to the Dribbble and I wanted some advice on the designs that I have in my head. I hope I can hear some advice from you, and maybe even some positive feedback because it's my first time opening my designs to the world, and I really want to get better at it. This design was made in order to visualise how I imagine the right way to export files, and right before you are about to export them, you can check if all the files you have selected are there, and you can even change your mind by deselecting the specific files via the checkbox.
I am exporting via Illustrator and using "For the web" function, so I hope this won't have ruined edges.
I am starting as a UX designer, and some things that I really can't understand is why people are doing obvious things the wrong way.
See you at my next design, and hope you are doing all good during these tough times. ;)