Box cover / Screen shot folders for Mame
It seems that there is an issue with the folders that are used for MAME covers and screenshots. For some reason, MAME covers are stored in the screenshot folder and MAME screenshots are stored in the covers folder. I am using external storage on my phone using the default folder: storage/xxxx-xxxx/Android/data/com.digdroid.alman.dig/files.
I also have some Playstation games installed on DIG and the covers and screenshots are in the appropriate folders for that system.
This issue might just be specific to MAME games. As I add more systems, I will update this post.