How do I remove the shared server from my photos?

[AC Question]

I "accepted" some apt on sharing pics to their phone and now when they receive it, they can't open it or it says "expired". I want it removed!

 

[B. Diddy]

Welcome to Android Central! Sorry, but can you clarify that? I'm not sure what "I accepted some apt on sharing pics to their phone" means. Did you install an app that shares pics with friends? Which app?