When photos are deleted from an Android device, they are not fully removed from the device's internal storage or SD card immediately. Instead, the space occupied by the deleted photo(s) is marked as available for future use by the device's file system. However, until new data is written over the deleted file(s), they can still be recovered with the help of specialized data recovery tools. Therefore, it is always recommended to immediately stop using the device's storage space after data deletion to prevent overwriting of the deleted photos. It is also advisable to regularly back up important files to prevent permanent loss due to accidental deletion or device damage.