I have used Builder to create a plugin to input some data. One of the input field is for image file. The type of this input field is mediafinder. These data are only for internal usage so I do not want to put the images into the storage/media folder but keeping the media storage for public usage. I would want to know if I can and how to customize the storage path of the mediafinder so it can link to another path rather than the media path. Thank you!

Just use field type "fileupload".

Okay, thank you! I will try it.