root access – Recovering specific files and folders from Galaxy S6 edge plus

i have a rooted and factory deleted Galaxy S6 edge plus, from which i want to extract/recover specific files(with specific extensions).

All the “common” software only searches for documents, pictures, messages, contacts etc.

The problem is that i have used a media hider software HD SMTH/Hide something

this saves the files in a .pg directory(i dont know here) and also changes the extension into .pg or something similiar(check link).

Can someone help me get my nuclear photos and videos back even though i have done a factory reset? any help would be much appreciated <3