Four Month ago I have mistakenly deleted a photo, can I find it? how?
If you were backing up photos in your 360 backup set, that photo should still be there. Using a Windows Admin account open Windows Explorer and click on This PC in the left pane and then double click on Norton Backup Drive in the right pane. Then double click on your backup set that contains your photos. Then scroll through the photos until you find the one you are looking for. Right click and choose Restore.
It may not be possible, but you can try running Recuva from Piriform.
Download Recuva | Recover deleted files, free! (ccleaner.com)