How to permanently delete photos from your phone
Photos deleted from your phone are not permanently erased, they can be recovered with photo recovery software with just few clicks. If you are not willing to see the deleted photos still holding a slight chance of resurrection, there are a few methods to deleted photos or any types of files permanently.
Say it is a photo get deleted, the OS of the phone will mark the storage place where the photo occupied as available for future use, until new photos come and take the place, the deleted photo remains there and being recoverable. So, to smother the chance, you should take as many photos or videos as possible to overwrite the very spot where the deleted photos occupied, or move large files to the storage. It's like throwing a bucket of paint on the wall to catch that little spot. This is the method the photos will die naturally. But if you want to kill the photos, read on.
Software like file shredder is the safest bet to erase a file permanently, after being shredded, the file will beyond the reach of recovery software
This is a tutorial about how to permanently delete photos from your phone with file shredder
Download file shredder. Install
Connect your phone with computer via USB cable
Launch software, click add files and navigate to the storage of your phone. Select photos you want to erase, if the photos are already deleted, click "cancel", backup the files you want to keep and click "shred folder", which will allow you shred the entire folder that keeps the deleted files, just remember to back up the file you want to keep.
Click shred files, they will be gone forever, there' no chance that anyone can recover photos from your phone