applications – Is DiskDigger a legit app?

can someone tell me if DiskDigger is a legit app or not? I’ve used it because I was desperate, and now I’m regretting it super hard. It has 100+ Million downloads on Google Play, but I don’t know. I want to know if I’m safe or not. It requires a “full network access” alongside with requiring access to photos. That part is making me super nervous and I didn’t bother checking permission only after using it. Can someone please explain? Can they expose my privacy? (I mean, I don’t have any nudes, gore or illegal stuff, but I still have some pretty private things)

I apologize for grammatical mistakes. Thanks.