Hey there @serdarkaracay.
For now, we do not have this functionality built into Unbounce though you could feasibly embed a third-party form that might let you achieve this. I searched for upload services and came across the link below.
http://www.uploadthingy.com/
I have yet to try this on a page myself but it’s a good place to start to which you can then use External Conversion Tracking (snippet placed on a thank you page) to make this work. Let me know how it goes!
Thank you @phildilello.
I will move forward with my solution.