According to the snap review details:
Use of the system-files interface is reserved for vetted publishers. If your snap legitimately requires this access, please make a request in the forum using the 'store-requests' category (https://forum.snapcraft.io/), or if you would prefer to keep this private, the 'sensitive' category
Snap aphoto is a java based application (Swing GUI). And it’s an image process software. It need record logs, make projects config, read images and project config files and output the images result. So I request the use of the system-files interface for snap aphoto.
Thanks in advance.