Local Storage for Azure Functions

How much and what kind of local storage do Azure functions have? Currently, my application uses a locally stored "exe" to download and edit some videos, all of which happens on local storage ("c:/../.../ on my machine"). When I try to use this logic with an azure function is continuously restarts as it believes the files have changed. Is there a way to store files locally temporarily? Once the function has finished executing I don't need these files anymore.