It depends on what type of Samsung phone you have. Most devices running Android 5.0+ will store all of your photos and videos in the "Gallery" app. If you're using a Samsung device from 2015 or later, you'll also find an album in your Gallery app labeled "Device Folders". This will contain all of your photos and videos stored on your device.
If you have an older Samsung device, you'll have to check the settings for other apps you may have installed to view your pictures, such as Google Photos, that have their own album structure.
Once you have located the album you can swipe down on the folder and select "Show Contents" from the options menu. This will give you a list of all the photos in the folder, along with the location of the file.
If you want to find out where the file is stored on your device, you can simply press and hold the picture and select "Show in folder" from the options menu. This will open the folder on your device where the picture is stored. You can then copy it to another folder or share it with another app.
Hope this helps!
